Electrum Review: 3 Things to Know (2020 Updated)

Everyday info sec, hardcore info sec, and DNMs

Edit: Currently writing a new version of this, dont know when it will be done.
Edit: Since first post I have updated a few sections with additional information.
I recommend reading it all even if it is very long, I might have placed some relevant info in different sections while thinking about what else needed to be added, plenty of steps remains mostly the same except when I comment directly on it. It is not necessary to do 100% security all the time, unless you absolutely need it, combining some high and some lower security ideas for a balance of security and convenience is useful.
I will base this mostly on Windows, Linux users probably know this, and I have no idea how apple machines work (tho many things in here are still relevant for other operating systems, as they are just general tips)
Disclaimer: There are certainly other steps that can make you more anonymous or safer, however I think for most people this will surfice. Any software I recommend should be independently verified for security, and examples of software are not to be taken as endorsements. I simply use examples and give recommendations when I believe it necessary, or helpful.
I will not really differentiate between anonymity and security, they are often the same thing. As such the word security can mean either more anonymous, less vulnerable, or both.
--------
Everyday Simple Info Sec:
-There could be a hidden administrator user on your PC, make sure to change its password
(Snapchat msgs, reddit dms, discord msgs, are just a few examples of msgs that are never encrypted)
-Any info even send in encrypted msgs (and obviously non encrypted) should still be kept with possible deniability, don't say "I'm gonna do MDMA", say "I'm going out with molly."
-DO NOT STORE ANY PASSWORDS ON GOOGLE, IF GOOGLE LOGIN IS AUTHENTICATED IT WILL AUTFILL ALL PASSWORDS IT HAS SAVED (same with other similar services) (This means if you are logged in to chrome and someone has access to your machine, they can auto fill passwords without entering a single password)
-use a rememberable passphrase, especially for your master key ring aka password manager A long sentence that is memorable makes an okay password (decent example,: "I met my wife at Little Ceasers for the first time on 07/09/20" better even if it's just something you know, if its impersonal, and if you can add special characters or numbers that you won't forget) (A better example for a passphrase is: "There is 0nly 0ne letter that d0esn’t appear in any U.S. state nameQ")
-Purge your internet activity frequently, there's a reason why I only have one post, and a few comments appearing in my account, but thousands of kama. Exposing information needlessly is not good.
-Never post private information publicly, and if you do, do it vaguely as possible. (Example: Not "I'm 15", say "I'm a teenager") Do not post any vital information ever, no birthdays, mother's maiden name, age, or anything you have ever seen in a security question. Never post your current activities while they are ongoing. You going on a vacation? Don't announce it to the world, taking picture there? Post them when you are home.
-Rethink how you do security questions. Many answers to security questions can be found in your internet history. One could use the first word of the security question as an answer, or a different sceme that will mean you always remember it. (Security question need to go, the amount of personal info an average person puts on the internet makes it easy to attack anything using security question)
-------_
High level crimimal information security:
The motto here is, "All the Security, All the Time" As one fuck up can end with you leaving a lick of traceability, and you could be fucked.
Pre Note: All of your software should always be up to date. Also even perfect info sec does not guarantee you are completely safe, a new zero day (exploit) can still fuck you, but good info security makes you significantly safer, by eliminating as many attacks as possible.
-Get a new device (or make a already owned device seem like you never owned it, do this only if you know how to, there's a lot of stuff that goes into that, like changing your mac adress etc) buy with cash, and your face covered, preferably far away from where you live. (Do I need to specify to not bring your phone or anything else that tracks your location to anywhere you want to go anonymously?) (Be aware that even hardware can have vulnerabilities, many cpus have known vulnerabilities, I can't list them all, do some research before buying)
-If you know how to use Tails (A linux distro designed for Info sec) use that, preferably on a USB. (Or learn how to use tails, its better, but complicated) Otherwise a clean copy of windows (make sure its not in any way associated with you) can do the job too, tho not as well. (Using a VM might give extra security, since VMs usually erase all data and RAM they were using on shutdown)
-Get a non tracking VPN, Enable the kill switch (a setting that disables all traffic that doesn't go through the VPN) (change your firewall settings to only allow the traffic from the VPN, windows guide (Change settings so only traffic from the tor application is send) Edit: (Due to complaints: do not use vpn over tor, use tor over vpn. tor over vpn has no notable downside, if the VPN logs it makes no difference, your ISP will always log anyways, and vpns remove other attack vectors and also provide backup security should tor fail. Again even if the VPN tracks you only change the people doing the tracking, but now you are further removed making it more anonymous and also with less vulnerabilities)
-rember privacy settings, cookie cleaner, and antivirus, password (There could be a hidden administrator user on your PC, make sure to change its password)
-Always use the device on a non admin account
-Ideally use this device only on networks that are not connected with you. Such as public networks (try to never use the same public networks twice, move around) (a home network should be fine now, as it should never be exposed, but more security is always better) (Its just a conveniences vs security trade)
-Never use accounts that have been exposed to lower security on higher security machines
-your browser is now TOR (or your preferred security focused browser, if you dont plan on using onion ) Make sure you get the standalone version of tor not the addon build (the standalone is safer, because there are less settings and options to tweak)
-Change your tor settings, to safest mode, enable a bridge (to my knowledge there's no difference in security between the build in bridges in tor), enable automatic updates, set duckduckgo onion as your primary browser. Set dark.fail onion page as your home page. (Or your preferred privacy search engine and onion directory)
-------_
How to use dark net markets (DNMs)
If you finished your High Security setup, we can dive right in. Otherwise go do that. This is where all that is essential.
Quick info on Tor, and onion sites. There is no search engine. It's all based of directories and addresses you are given by others. Tor will likely not be very quick, it has to pass through multiple networks to get to the destination. DNMs sometimes exit scam, an exit scam is when a market shuts down completely and takes all the money, this is a risk when using DNMs, it's not too common but happens maybe 0-4 times a year. The admins of thoese servers need to get out at some point, before they get jailed, so they exit the game, and scam everyone out of their money.
-A very useful onion directory is dark.fail it has a lot of links, for all kinds of stuff. News, email, DNMs, Psychonautwiki (harm reduction website), forums etc. (Other directories also exist)
-Pick a market, preferably one that handles secure connection server side instead of requiring you to establish the secure connection. Then create an account. Your account once created should include an entry box in your profile for a pgp key, post your PUBLIC key in there. (Verify the link is not a scam, most markets should provide a pgp signature)
-Next is currency setup. All major cryptocurrency exchangers can be used, I can recommend coin base but there could be better ones out there. Unless you find a small non U.S., exchange, they will always ask for your identity. So unless you can find a trustworthy exchange that doesn't ID, you will need to give it to them. (Side note, all major crypto exchangers report to the IRS, if the IRS asks you if you bought cryptocurrency and you bought while having IDed yourself SAY YES, DO NOT COMMIT TAX FRAUD WHEN THEY KNOW YOU DID)
-Transfer (monero you can send directly, btc you should scramble) to your wallet. There are two options a cold wallet (physical) or a software wallet. Software wallets usually dont cost anything so I recommend them, even if often less safe. Electrum is easy to use, and pretty safe. You can also do your own research and find a wallet that fits your needs.
-now you are ready to buy, only buy using escrow (it means the money is held by the market as a middle man until the product is delivered, they will also handle any issues like wrong quantity, cuts, etc), judge the reviews for a product, and if available look at the history of the vendor, until you find a product from a vendor you trust. (I recommend to buy within your country as much as possible, so it doesn't go through customs, it's very rare that something is found, but it can happen)
-now you get to buy, depending on market, you either have cryptocurrency stored in their wallets (not recommend, you will lose it in an exit scam) or you can send it every order. When you send your delivery adress (or the one you want it to go to) encrypt the adress using the sellers public key. Make sure the adress is correct.
-wait for the product, make sure to extend the escrow until the product arrives, if you can't extend it anymore dispute the order, and a moderator will step in
-test the product, use it, and leave a review. PLEASE LEAVE A REVIEW, DNMs only work because of reviews.
Edit: Didn't imagine I would write over 15000 words. Oh well, it was fun. Hope it helps, if you have any questions feel free to ask.
No idea how long this will stay up, I might purge it in 7 days, or never.
submitted by seven_N_A7 to u/seven_N_A7 [link] [comments]

v5.4.3 is out on iOS and Android

v5.4.3 is out on iOS and Android

bluewallet - local trader
Monster release 🔥
This version features the ability to buy on the "Local Trader". A p2p marketplace where you control your funds.
You can now login (w/ hodlhodl), view offers, view contracts and accept offers.
info here👇
https://bluewallet.io/local-trade

NEW 👏
  • Accept offer (buy Bitcoin)
  • Login to Local Trader with HodlHodl
  • New full listing screen
  • See your contracts/offers
  • Labelling and edit on-chain transactions
  • ILS local currency 🇮🇱
FIXED
  • Improved electrum server connectivity
  • lnurl withdrawal when default unit is not sats
  • StatusBar wasn't visible when modals opened
  • Euro symbol for iOS Today extension
  • Remove support for BIP70

Building a Bitcoin wallet is hard. Your help is important to build a spectacular Bitcoin wallet for the community.
How can you help? Leave us a review on the app stores. It really helps! Is that simple :)
Keep building! 💙👊
submitted by ncoelho to bluewallet [link] [comments]

Crypto Wallet Extensions: Why Easy Access for You May Also Mean Easy Access for Scammers

Crypto Wallet Extensions: Why Easy Access for You May Also Mean Easy Access for Scammers

https://preview.redd.it/3q59auglzf351.jpg?width=1400&format=pjpg&auto=webp&s=9aa76610c7345620ed7f349056bad2976298b475
For the most part, Bitcoin and crypto are areas of interest for investors looking to diversify their portfolio or engage in trading with a potentially profitable asset. However, more and more services are coming out that allow the average person to start getting into crypto (take Lolli’s crypto-back model, for example). Of course, the average person is going to be looking for the easiest ways to participate in the crypto economy, which often means reaching for wallet providers who give them quick and convenient access to their funds.
One such example of these products is the ever-popular chrome extension. While these solutions do make it more convenient to receive crypto, they often come with a major disadvantage: being scammed out of your money.
Fake Google crypto wallet extensions for Chrome are a rapidly growing problem. This is due to the fact that anyone can create a product that is almost identical to similar ones offered through the web store. In fact, some imposters were developing wallets that copied those offered by major organizations like Ledger, Electrum, and Exodus, just to name a few.
Once you download the browser extension and sign up for your wallet, the information then gets transferred over to the hacker’s server rather than Google’s. This gives hackers immediate access to your funds. While more seasoned investors and enthusiasts will know to be on their toes for any potential scams, those who are new to the industry can easily fall for these fake extensions as it can be quite hard to tell the difference.
If you are someone who is just getting into crypto (or someone who has downloaded a chrome extension in the past or plans to download one for specific needs) some great rules to follow include:
  • Making sure that you pay attention to the name of the developer and the website that it is directing you to. Some developer names will be glaringly obvious while other hackers will slightly change the website name to trick you into thinking it is authentic. If the link brings you to the wrong website that is not the one for the official company, it is a false extension.
  • Look at the quality of the content and the images listed in the description for the Chrome extension. Like the name of the developer, some fake extensions will give themselves away by using sub-par images or having multiple typos listed throughout the copy, which is something that a company is extremely unlikely to have in their own extension description.
  • Taking a look at some of the product reviews for the extension. While you should take into account that some reviews can be fake, it may be revealed that the extension is not real if you run into more than a handful of negative reviews and comments.
While Google is cracking down on these copycats, you still have to exercise caution in case one of them gets through. Using the three tips provided above is one excellent way to make sure you don’t lose your money by downloading the wrong extension.
As the price of crypto continues to rise and interest piques, making sure that you are avoiding any potential hackers is key to protecting your assets as you explore the world of cryptocurrency.
***
Trakx is building a one-stop shop for Crypto Traded Indices. Discover more about our project on our website and social media channels, such as Telegram http://t.me/trakx_io.
submitted by Trakx_io to Trakx [link] [comments]

Groestlcoin 6th Anniversary Release

Introduction

Dear Groestlers, it goes without saying that 2020 has been a difficult time for millions of people worldwide. The groestlcoin team would like to take this opportunity to wish everyone our best to everyone coping with the direct and indirect effects of COVID-19. Let it bring out the best in us all and show that collectively, we can conquer anything.
The centralised banks and our national governments are facing unprecedented times with interest rates worldwide dropping to record lows in places. Rest assured that this can only strengthen the fundamentals of all decentralised cryptocurrencies and the vision that was seeded with Satoshi's Bitcoin whitepaper over 10 years ago. Despite everything that has been thrown at us this year, the show must go on and the team will still progress and advance to continue the momentum that we have developed over the past 6 years.
In addition to this, we'd like to remind you all that this is Groestlcoin's 6th Birthday release! In terms of price there have been some crazy highs and lows over the years (with highs of around $2.60 and lows of $0.000077!), but in terms of value– Groestlcoin just keeps getting more valuable! In these uncertain times, one thing remains clear – Groestlcoin will keep going and keep innovating regardless. On with what has been worked on and completed over the past few months.

UPDATED - Groestlcoin Core 2.18.2

This is a major release of Groestlcoin Core with many protocol level improvements and code optimizations, featuring the technical equivalent of Bitcoin v0.18.2 but with Groestlcoin-specific patches. On a general level, most of what is new is a new 'Groestlcoin-wallet' tool which is now distributed alongside Groestlcoin Core's other executables.
NOTE: The 'Account' API has been removed from this version which was typically used in some tip bots. Please ensure you check the release notes from 2.17.2 for details on replacing this functionality.

How to Upgrade?

Windows
If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), then run the installer.
OSX
If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), run the dmg and drag Groestlcoin Core to Applications.
Ubuntu
http://groestlcoin.org/forum/index.php?topic=441.0

Other Linux

http://groestlcoin.org/forum/index.php?topic=97.0

Download

Download the Windows Installer (64 bit) here
Download the Windows Installer (32 bit) here
Download the Windows binaries (64 bit) here
Download the Windows binaries (32 bit) here
Download the OSX Installer here
Download the OSX binaries here
Download the Linux binaries (64 bit) here
Download the Linux binaries (32 bit) here
Download the ARM Linux binaries (64 bit) here
Download the ARM Linux binaries (32 bit) here

Source

ALL NEW - Groestlcoin Moonshine iOS/Android Wallet

Built with React Native, Moonshine utilizes Electrum-GRS's JSON-RPC methods to interact with the Groestlcoin network.
GRS Moonshine's intended use is as a hot wallet. Meaning, your keys are only as safe as the device you install this wallet on. As with any hot wallet, please ensure that you keep only a small, responsible amount of Groestlcoin on it at any given time.

Features

Download

iOS
Android

Source

ALL NEW! – HODL GRS Android Wallet

HODL GRS connects directly to the Groestlcoin network using SPV mode and doesn't rely on servers that can be hacked or disabled.
HODL GRS utilizes AES hardware encryption, app sandboxing, and the latest security features to protect users from malware, browser security holes, and even physical theft. Private keys are stored only in the secure enclave of the user's phone, inaccessible to anyone other than the user.
Simplicity and ease-of-use is the core design principle of HODL GRS. A simple recovery phrase (which we call a Backup Recovery Key) is all that is needed to restore the user's wallet if they ever lose or replace their device. HODL GRS is deterministic, which means the user's balance and transaction history can be recovered just from the backup recovery key.

Features

Download

Main Release (Main Net)
Testnet Release

Source

ALL NEW! – GroestlcoinSeed Savior

Groestlcoin Seed Savior is a tool for recovering BIP39 seed phrases.
This tool is meant to help users with recovering a slightly incorrect Groestlcoin mnemonic phrase (AKA backup or seed). You can enter an existing BIP39 mnemonic and get derived addresses in various formats.
To find out if one of the suggested addresses is the right one, you can click on the suggested address to check the address' transaction history on a block explorer.

Features

Live Version (Not Recommended)

https://www.groestlcoin.org/recovery/

Download

https://github.com/Groestlcoin/mnemonic-recovery/archive/master.zip

Source

ALL NEW! – Vanity Search Vanity Address Generator

NOTE: NVidia GPU or any CPU only. AMD graphics cards will not work with this address generator.
VanitySearch is a command-line Segwit-capable vanity Groestlcoin address generator. Add unique flair when you tell people to send Groestlcoin. Alternatively, VanitySearch can be used to generate random addresses offline.
If you're tired of the random, cryptic addresses generated by regular groestlcoin clients, then VanitySearch is the right choice for you to create a more personalized address.
VanitySearch is a groestlcoin address prefix finder. If you want to generate safe private keys, use the -s option to enter your passphrase which will be used for generating a base key as for BIP38 standard (VanitySearch.exe -s "My PassPhrase" FXPref). You can also use VanitySearch.exe -ps "My PassPhrase" which will add a crypto secure seed to your passphrase.
VanitySearch may not compute a good grid size for your GPU, so try different values using -g option in order to get the best performances. If you want to use GPUs and CPUs together, you may have best performances by keeping one CPU core for handling GPU(s)/CPU exchanges (use -t option to set the number of CPU threads).

Features

Usage

https://github.com/Groestlcoin/VanitySearch#usage

Download

Source

ALL NEW! – Groestlcoin EasyVanity 2020

Groestlcoin EasyVanity 2020 is a windows app built from the ground-up and makes it easier than ever before to create your very own bespoke bech32 address(es) when whilst not connected to the internet.
If you're tired of the random, cryptic bech32 addresses generated by regular Groestlcoin clients, then Groestlcoin EasyVanity2020 is the right choice for you to create a more personalised bech32 address. This 2020 version uses the new VanitySearch to generate not only legacy addresses (F prefix) but also Bech32 addresses (grs1 prefix).

Features

Download

Source

Remastered! – Groestlcoin WPF Desktop Wallet (v2.19.0.18)

Groestlcoin WPF is an alternative full node client with optional lightweight 'thin-client' mode based on WPF. Windows Presentation Foundation (WPF) is one of Microsoft's latest approaches to a GUI framework, used with the .NET framework. Its main advantages over the original Groestlcoin client include support for exporting blockchain.dat and including a lite wallet mode.
This wallet was previously deprecated but has been brought back to life with modern standards.

Features

Remastered Improvements

Download

Source

ALL NEW! – BIP39 Key Tool

Groestlcoin BIP39 Key Tool is a GUI interface for generating Groestlcoin public and private keys. It is a standalone tool which can be used offline.

Features

Download

Windows
Linux :
 pip3 install -r requirements.txt python3 bip39\_gui.py 

Source

ALL NEW! – Electrum Personal Server

Groestlcoin Electrum Personal Server aims to make using Electrum Groestlcoin wallet more secure and more private. It makes it easy to connect your Electrum-GRS wallet to your own full node.
It is an implementation of the Electrum-grs server protocol which fulfils the specific need of using the Electrum-grs wallet backed by a full node, but without the heavyweight server backend, for a single user. It allows the user to benefit from all Groestlcoin Core's resource-saving features like pruning, blocks only and disabled txindex. All Electrum-GRS's feature-richness like hardware wallet integration, multi-signature wallets, offline signing, seed recovery phrases, coin control and so on can still be used, but connected only to the user's own full node.
Full node wallets are important in Groestlcoin because they are a big part of what makes the system be trust-less. No longer do people have to trust a financial institution like a bank or PayPal, they can run software on their own computers. If Groestlcoin is digital gold, then a full node wallet is your own personal goldsmith who checks for you that received payments are genuine.
Full node wallets are also important for privacy. Using Electrum-GRS under default configuration requires it to send (hashes of) all your Groestlcoin addresses to some server. That server can then easily spy on your transactions. Full node wallets like Groestlcoin Electrum Personal Server would download the entire blockchain and scan it for the user's own addresses, and therefore don't reveal to anyone else which Groestlcoin addresses they are interested in.
Groestlcoin Electrum Personal Server can also broadcast transactions through Tor which improves privacy by resisting traffic analysis for broadcasted transactions which can link the IP address of the user to the transaction. If enabled this would happen transparently whenever the user simply clicks "Send" on a transaction in Electrum-grs wallet.
Note: Currently Groestlcoin Electrum Personal Server can only accept one connection at a time.

Features

Download

Windows
Linux / OSX (Instructions)

Source

UPDATED – Android Wallet 7.38.1 - Main Net + Test Net

The app allows you to send and receive Groestlcoin on your device using QR codes and URI links.
When using this app, please back up your wallet and email them to yourself! This will save your wallet in a password protected file. Then your coins can be retrieved even if you lose your phone.

Changes

Download

Main Net
Main Net (FDroid)
Test Net

Source

UPDATED – Groestlcoin Sentinel 3.5.06 (Android)

Groestlcoin Sentinel is a great solution for anyone who wants the convenience and utility of a hot wallet for receiving payments directly into their cold storage (or hardware wallets).
Sentinel accepts XPUB's, YPUB'S, ZPUB's and individual Groestlcoin address. Once added you will be able to view balances, view transactions, and (in the case of XPUB's, YPUB's and ZPUB's) deterministically generate addresses for that wallet.
Groestlcoin Sentinel is a fork of Groestlcoin Samourai Wallet with all spending and transaction building code removed.

Changes

Download

Source

UPDATED – P2Pool Test Net

Changes

Download

Pre-Hosted Testnet P2Pool is available via http://testp2pool.groestlcoin.org:21330/static/

Source

submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

/r/Bitcoin FAQ - Newcomers please read

Welcome to the /Bitcoin Sticky FAQ

You've probably been hearing a lot about Bitcoin recently and are wondering what's the big deal? Most of your questions should be answered by the resources below but if you have additional questions feel free to ask them in the comments.
The following videos are a good starting point for understanding how bitcoin works and a little about its long term potential:
For some more great introductory videos check out Andreas Antonopoulos's YouTube playlists, he is probably the best bitcoin educator out there today. Also have to give mention to James D'Angelo's Bitcoin 101 Blackboard series. Lots of additional video resources can be found at the videos wiki page or /BitcoinTV.
Key properties of bitcoin
Some excellent writing on Bitcoin's value proposition and future can be found here. Bitcoin statistics can be found here, here and here. Developer resources can be found here and here. Peer-reviewed research papers can be found here. The number of times Bitcoin was declared dead by the media can be found here. Scaling resources here, and of course the whitepaper that started it all.

Where can I buy bitcoins?

BuyBitcoinWorldwide.com and Howtobuybitcoin.io are helpful sites for beginners. You can buy or sell any amount of bitcoin and there are several easy methods to purchase bitcoin with cash, credit card or bank transfer. Some of the more popular resources are below, also, check out the bitcoinity exchange resources for a larger list of options for purchases.
Bank Transfer Credit / Debit card Cash
Coinbase Coinbase LocalBitcoins
Gemini Bitstamp LibertyX
GDAX Bitit Mycelium LocalTrader
Bitstamp Cex.io BitQuick
Kraken CoinMama WallofCoins
Xapo BitcoinOTC
Cex.io
itBit
Bitit
Bitsquare
Here is a listing of local ATMs. If you would like your paycheck automatically converted to bitcoin use Cashila or Bitwage.
Note: Bitcoins are valued at whatever market price people are willing to pay for them in balancing act of supply vs demand. Unlike traditional markets, bitcoin markets operate 24 hours per day, 365 days per year. Preev is a useful site that that shows how much various denominations of bitcoin are worth in different currencies. Alternatively you can just Google "1 bitcoin in (your local currency)".

Securing your bitcoins

With bitcoin you can "Be your own bank" and personally secure your bitcoins OR you can use third party companies aka "Bitcoin banks" which will hold the bitcoins for you.
Android iOs Desktop
Mycelium BreadWallet Electrum
CoPay AirBitz Armory
Another interesting use case for physical storage/transfer is the Opendime. Opendime is a small USB stick that allows you to spend Bitcoin by physically passing it along so it's anonymous and tangible like cash.
Note: For increased security, use Two Factor Authentication (2FA) everywhere it is offered, including email!
2FA requires a second confirmation code to access your account, usually from a text message or app, making it much harder for thieves to gain access. Google Authenticator and Authy are the two most popular 2FA services, download links are below. Make sure you create backups of your 2FA codes.
Google Auth Authy
Android Android
iOS iOS

Where can I spend bitcoins?

A more comprehensive list can be found at the Trade FAQ but some more commons ones are below.
Store Product
Gyft Gift cards for hundreds of retailers including Amazon, Target, Walmart, Starbucks, Whole Foods, CVS, Lowes, Home Depot, iTunes, Best Buy, Sears, Kohls, eBay, GameStop, etc.
Steam, HumbleBundle, Games Planet, itch.io, g2g and kinguin For when you need to get your game on
Microsoft Xbox games, phone apps and software
Spendabit, The Bitcoin Shop, Overstock, DuoSearch, The Bitcoin Directory and BazaarBay Retail shopping with millions of results
ShakePay Generate one time use Visa cards in seconds
NewEgg and Dell For all your electronics needs
Cashila, Bitwa.la, Coinbills, Piixpay, Bitbill.eu, Bylls, Coins.ph, Bitrefill, Pey.de, LivingRoomofSatoshi, Hyphen.to, Coinsfer, GetPaidinBitcoin, Coins.co.th, More #1, #2 Bill payment
Foodler, Menufy, Takeaway, Thuisbezorgd NL, Pizza For Coins Takeout delivered to your door!
Expedia, Cheapair, Lot, Destinia, BTCTrip, Abitsky, SkyTours, Fluege the Travel category on Gyft and 9flats For when you need to get away
BoltVM, BitHost VPS service
Cryptostorm, Mullvad, and PIA VPN services
Namecheap, Porkbun For new domain name registration
Stampnik and GetUSPS Discounted USPS Priority, Express, First-Class mail postage
Reddit Gold Premium membership which can be gifted to others
Coinmap, 99Bitcoins and AirBitz are helpful to find local businesses accepting bitcoins. A good resource for UK residents is at wheretospendbitcoins.co.uk.
There are also lots of charities which accept bitcoin donations, such as Wikipedia, Red Cross, Amnesty International, United Way, ACLU and the EFF. You can find a longer list here.

Merchant Resources

There are several benefits to accepting bitcoin as a payment option if you are a merchant;
If you are interested in accepting bitcoin as a payment method, there are several options available;

Can I mine bitcoin?

Mining bitcoins can be a fun learning experience, but be aware that you will most likely operate at a loss. Newcomers are often advised to stay away from mining unless they are only interested in it as a hobby similar to folding at home. If you want to learn more about mining you can read more here. Still have mining questions? The crew at /BitcoinMining would be happy to help you out.
If you want to contribute to the bitcoin network by hosting the blockchain and propagating transactions you can run a full node using this setup guide. Bitseed is an easy option for getting set up. You can view the global node distribution here.

Earning bitcoins

Just like any other form of money, you can also earn bitcoins by being paid to do a job.
Site Description
WorkingForBitcoins, Bitwage, XBTfreelancer, Cryptogrind, Bitlancerr, Coinality, Bitgigs, /Jobs4Bitcoins, Rein Project Freelancing
OpenBazaar, Purse.io, Bitify, /Bitmarket, 21 Market Marketplaces
Watchmybit, Streamium.io, OTika.tv, XOtika.tv NSFW, /GirlsGoneBitcoin NSFW Video Streaming
Bitasker, BitforTip, WillPayCoin Tasks
Supload.com, SatoshiBox, JoyStream, File Army File/Image Sharing
CoinAd, A-ads, Coinzilla.io Advertising
You can also earn bitcoins by participating as a market maker on JoinMarket by allowing users to perform CoinJoin transactions with your bitcoins for a small fee (requires you to already have some bitcoins)

Bitcoin Projects

The following is a short list of ongoing projects that might be worth taking a look at if you are interested in current development in the bitcoin space.
Project Description
Lightning Network, Amiko Pay, and Strawpay Payment channels for network scaling
Blockstream and Drivechain Sidechains
21, Inc. Open source library for the machine payable web
ShapeShift.io Trade between bitcoins and altcoins easily
Open Transactions, Counterparty, Omni, Open Assets, Symbiont and Chain Financial asset platforms
Hivemind and Augur Prediction markets
Mirror Smart contracts
Mediachain Decentralized media library
Tierion and Factom Records & Titles on the blockchain
BitMarkets, DropZone, Beaver and Open Bazaar Decentralized markets
Samourai and Dark Wallet - abandoned Privacy-enhancing wallets
JoinMarket CoinJoin implementation (Increase privacy and/or Earn interest on bitcoin holdings)
Coinffeine and Bitsquare Decentralized bitcoin exchanges
Keybase and Bitrated Identity & Reputation management
Bitmesh and Telehash Mesh networking
JoyStream BitTorrent client with paid seeding
MORPHiS Decentralized, encrypted internet
Storj and Sia Decentralized file storage
Streamium and Faradam Pay in real time for on-demand services
Abra Global P2P money transmitter network
bitSIM PIN secure hardware token between SIM & Phone
Identifi Decentralized address book w/ ratings system
Coinometrics Institutional-level Bitcoin Data & Research
Blocktrail and BitGo Multisig bitcoin API
Bitcore Open source Bitcoin javascript library
Insight Open source blockchain API
Leet Kill your friends and take their money ;)

Bitcoin Units

One Bitcoin is quite large (hundreds of £/$/€) so people often deal in smaller units. The most common subunits are listed below:
Unit Symbol Value Info
millibitcoin mBTC 1,000 per bitcoin SI unit for milli i.e. millilitre (mL) or millimetre (mm)
microbitcoin μBTC 1,000,000 per bitcoin SI unit for micro i.e microlitre (μL) or micrometre (μm)
bit bit 1,000,000 per bitcoin Colloquial "slang" term for microbitcoin
satoshi sat 100,000,000 per bitcoin Smallest unit in bitcoin, named after the inventor
For example, assuming an arbitrary exchange rate of $500 for one Bitcoin, a $10 meal would equal:
For more information check out the Bitcoin units wiki.
Still have questions? Feel free to ask in the comments below or stick around for our weekly Mentor Monday thread. If you decide to post a question in /Bitcoin, please use the search bar to see if it has been answered before, and remember to follow the community rules outlined on the sidebar to receive a better response. The mods are busy helping manage our community so please do not message them unless you notice problems with the functionality of the subreddit. A complete list of bitcoin related subreddits can be found here
Note: This is a community created FAQ. If you notice anything missing from the FAQ or that requires clarification you can edit it here and it will be included in the next revision pending approval.
Welcome to the Bitcoin community and the new decentralized economy!
submitted by BinaryResult to Bitcoin [link] [comments]

/r/Bitcoin FAQ - Newcomers please read

Welcome to the /Bitcoin Sticky FAQ

You've probably been hearing a lot about Bitcoin recently and are wondering what's the big deal? Most of your questions should be answered by the resources below but if you have additional questions feel free to ask them in the comments.
Some great introductions for new users are My first bitcoin, Bitcoin explained and ELI5 Bitcoin. Also, the following videos are a good starting point for understanding how bitcoin works and a little about its long term potential:
Also have to give mention to Lopp.net, the Princeton crypto series and James D'Angelo's Bitcoin 101 Blackboard series. Some excellent writing on Bitcoin's value proposition and future can be found at the Satoshi Nakamoto Institute. Bitcoin statistics can be found here, here and here. Developer resources can be found here, here and here. Peer-reviewed research papers can be found here. Potential upcoming protocol improvements here. Scaling resources here. The number of times Bitcoin was declared dead by the media can be found here (LOL!), and of course Satoshi Nakamoto's whitepaper that started it all! :)
Key properties of bitcoin

Where can I buy bitcoins?

Bitcoin.org, BuyBitcoinWorldwide.com and Howtobuybitcoin.io are helpful sites for beginners. You can buy or sell any amount of bitcoin and there are several easy methods to purchase bitcoin with cash, credit card or bank transfer. Some of the more popular resources are below, also, check out the bitcoinity exchange resources for a larger list of options for purchases.
Bank Transfer Credit / Debit card Cash
Gemini Bitstamp LocalBitcoins
Bitstamp Bitit Mycelium LocalTrader
BitFinex Cex.io LibertyX
Cex.io CoinMama WallofCoins
Xapo Spectrocoin BitcoinOTC
Kraken Luno BitQuick
itBit
HitBTC
Bitit
Bisq (decentralized)
Luno
Spectrocoin
Here is a listing of local ATMs. If you would like your paycheck automatically converted to bitcoin use Bitwage.
Note: Bitcoins are valued at whatever market price people are willing to pay for them in balancing act of supply vs demand. Unlike traditional markets, bitcoin markets operate 24 hours per day, 365 days per year. Preev is a useful site that that shows how much various denominations of bitcoin are worth in different currencies. Alternatively you can just Google "1 bitcoin in (your local currency)".

Securing your bitcoins

With bitcoin you can "Be your own bank" and personally secure your bitcoins OR you can use third party companies aka "Bitcoin banks" which will hold the bitcoins for you.
Android iOs Desktop
Samouari BreadWallet Electrum
Another interesting use case for physical storage/transfer is the Opendime. Opendime is a small USB stick that allows you to spend Bitcoin by physically passing it along so it's anonymous and tangible like cash.
Note: For increased security, use Two Factor Authentication (2FA) everywhere it is offered, including email!
2FA requires a second confirmation code to access your account, usually from a text message or app, making it much harder for thieves to gain access. Google Authenticator and Authy are the two most popular 2FA services, download links are below. Make sure you create backups of your 2FA codes.
Google Auth Authy
Android Android
iOS iOS

Where can I spend bitcoins?

Check out spendabit or bitcoin directory for some good options, some of the more commons ones are listed below.
Store Product
Gyft Gift cards for hundreds of retailers including Amazon, Target, Walmart, Starbucks, Whole Foods, CVS, Lowes, Home Depot, iTunes, Best Buy, Sears, Kohls, eBay, GameStop, etc.
Steam, HumbleBundle, Games Planet, itch.io, g2g and kinguin For when you need to get your game on
Microsoft Xbox games, phone apps and software
Spendabit, Overstock, The Bitcoin Directory and BazaarBay Retail shopping with millions of results
ShakePay Generate one time use Visa cards in seconds
NewEgg and Dell For all your electronics needs
Bitwa.la, Coinbills, Piixpay, Bitbill.eu, Bylls, Coins.ph, Bitrefill, LivingRoomofSatoshi, Hyphen.to, Coinsfer, More #1, #2 Bill payment
Menufy, Takeaway, Thuisbezorgd NL, Pizza For Coins Takeout delivered to your door!
Expedia, Cheapair, Lot, Destinia, BTCTrip, Abitsky, SkyTours, Fluege the Travel category on Gyft and 9flats For when you need to get away
BitHost VPS service
Cryptostorm, Mullvad, and PIA VPN services
Namecheap, Porkbun For new domain name registration
Stampnik Discounted USPS Priority, Express, First-Class mail postage
Reddit Gold Premium membership which can be gifted to others
Coinmap and AirBitz are helpful to find local businesses accepting bitcoins. A good resource for UK residents is at wheretospendbitcoins.co.uk.
There are also lots of charities which accept bitcoin donations, such as Wikipedia, United Way, ACLU and the EFF. You can find a longer list here.

Merchant Resources

There are several benefits to accepting bitcoin as a payment option if you are a merchant;
If you are interested in accepting bitcoin as a payment method, there are several options available;

Can I mine bitcoin?

Mining bitcoins can be a fun learning experience, but be aware that you will most likely operate at a loss. Newcomers are often advised to stay away from mining unless they are only interested in it as a hobby similar to folding at home. If you want to learn more about mining you can read more here. Still have mining questions? The crew at /BitcoinMining would be happy to help you out.
If you want to contribute to the bitcoin network by hosting the blockchain and propagating transactions you can run a full node using this setup guide. Bitseed is an easy option for getting set up. You can view the global node distribution here.

Earning bitcoins

Just like any other form of money, you can also earn bitcoins by being paid to do a job.
Site Description
WorkingForBitcoins, Bitwage, XBTfreelancer, Cryptogrind, Bitlancerr, Coinality, Bitgigs, /Jobs4Bitcoins, Rein Project Freelancing
OpenBazaar, Purse.io, Bitify, /Bitmarket, 21 Market Marketplaces
Streamium.io, XOtika.tv NSFW, /GirlsGoneBitcoin NSFW Video Streaming
Bitasker, BitforTip Tasks
Supload.com, SatoshiBox, JoyStream, File Army File/Image Sharing
CoinAd, A-ads, Coinzilla.io Advertising
You can also earn bitcoins by participating as a market maker on JoinMarket by allowing users to perform CoinJoin transactions with your bitcoins for a small fee (requires you to already have some bitcoins)

Bitcoin Projects

The following is a short list of ongoing projects that might be worth taking a look at if you are interested in current development in the bitcoin space.
Project Description
Lightning Network, Amiko Pay, and Strawpay Payment channels for network scaling
Blockstream, Rootstock and Drivechain Sidechains
21, Inc. Open source library for the machine payable web
ShapeShift.io Trade between bitcoins and altcoins easily
Open Transactions, Counterparty, Omni, Open Assets, Symbiont and Chain Financial asset platforms
Hivemind and Augur Prediction markets
Mediachain Decentralized media library
Tierion and Factom Records & Titles on the blockchain
BitMarkets, DropZone, Beaver and Open Bazaar Decentralized markets
Samourai and Dark Wallet - abandoned Privacy-enhancing wallets
JoinMarket CoinJoin implementation (Increase privacy and/or Earn interest on bitcoin holdings)
Coinffeine and Bisq Decentralized bitcoin exchanges
Keybase and Bitrated Identity & Reputation management
Telehash Mesh networking
JoyStream BitTorrent client with paid seeding
MORPHiS Decentralized, encrypted internet
Storj and Sia Decentralized file storage
Streamium Pay in real time for on-demand services
Abra Global P2P money transmitter network
bitSIM PIN secure hardware token between SIM & Phone
Identifi Decentralized address book w/ ratings system
BitGo Multisig bitcoin API
Bitcore Open source Bitcoin javascript library
Insight Open source blockchain API
Leet Kill your friends and take their money ;)

Bitcoin Units

One Bitcoin is quite large (hundreds of £/$/€) so people often deal in smaller units. The most common subunits are listed below:
Unit Symbol Value Info
millibitcoin mBTC 1,000 per bitcoin SI unit for milli i.e. millilitre (mL) or millimetre (mm)
microbitcoin μBTC 1,000,000 per bitcoin SI unit for micro i.e microlitre (μL) or micrometre (μm)
bit bit 1,000,000 per bitcoin Colloquial "slang" term for microbitcoin
satoshi sat 100,000,000 per bitcoin Smallest unit in bitcoin, named after the inventor
For example, assuming an arbitrary exchange rate of $10000 for one Bitcoin, a $10 meal would equal:
For more information check out the Bitcoin units wiki.
Still have questions? Feel free to ask in the comments below or stick around for our weekly Mentor Monday thread. If you decide to post a question in /Bitcoin, please use the search bar to see if it has been answered before, and remember to follow the community rules outlined on the sidebar to receive a better response. The mods are busy helping manage our community so please do not message them unless you notice problems with the functionality of the subreddit. A complete list of bitcoin related subreddits can be found here
Note: This is a community created FAQ. If you notice anything missing from the FAQ or that requires clarification you can edit it here and it will be included in the next revision pending approval.
Welcome to the Bitcoin community and the new decentralized economy!
submitted by BinaryResult to Bitcoin [link] [comments]

MESSAGE TESTING! Looking for feedback, comments, and suggestions from the community

Hey everyone, the Komodo marketing team is finalizing some copy that will be used to send to people interested in building on Komodo. We'd like to message test this with the community before finalizing so please let us know if you have any suggestions or feedback. Thanks everyone!
END-TO-END BLOCKCHAIN SOLUTIONS
Komodo Platform is a thriving, open-source ecosystem of cutting-edge technologies in the burgeoning blockchain sphere. It is Komodo’s mission to accelerate the global adoption of blockchain technology by removing barriers to entry for developers, blockchain startups, and existing businesses alike with simple, end-to-end blockchain solutions.
When looking to integrate blockchain tech, there are many competing technologies and platforms to choose from. What sets Komodo Platform apart from the competition is a proven track record of identifying and innovating solutions to all of blockchain’s most pressing problems.
Rather than focusing on a single use case or feature, Komodo Platform has built a comprehensive toolkit of blockchain solutions that addresses every essential aspect of the technology. In particular, Komodo’s tech focuses on providing top-notch security, scalability, and interoperability, as well as hybrid privacy features.
This holistic approach ensures that all who build on Komodo have the tools they need to be successful, including a variety of customizable white-label products that slash time to market while still providing complete flexibility and control.
All of these strengths, combined with a clear vision for a global blockchain ecosystem, make Komodo Platform the world’s leading provider of end-to-end blockchain solutions.
AN ECOSYSTEM THAT ALWAYS PUTS SECURITY FIRST
For Komodo Platform, security comes first. Security is always at the forefront of the development process. As such, every blockchain launched on Komodo Platform is protected with the power of the Bitcoin hashrate.
At the same time, all blockchains built on Komodo are protected by Komodo’s innovative security mechanism, known as delayed Proof of Work (dPoW), which stores backups of the entire Komodo ecosystem onto the Bitcoin ledger every ten minutes.
Here’s how it works. Every ten minutes, a snapshot is taken of the entire Komodo ecosystem. Then, this snapshot is written into a block on the Bitcoin blockchain. This process is called notarization and it is the backbone of Komodo’s security mechanism. Komodo Platform’s notary nodes carry out the technical work required to successfully complete notarizations.
In essence, dPoW functions as a form of 2FA for blockchain projects. A potential attacker would need to take down both the BTC and KMD networks before they could alter, disrupt, or destroy your chain. Since the backup process takes place every ten minutes, your chain is constantly protected.
LIMITLESS SCALABILITY WHENEVER YOU NEED IT
Komodo provides every project built on the platform with virtually limitless scalability. A new feature from Komodo allows multiple blockchains to work in unison and behave as a single chain.
If one blockchain is no longer providing the performance you need, simply add another chain. If two isn’t sufficient, add a third. With Komodo Platform, you can scale on demand to keep up with the the needs of your business.
No other blockchain platform offers both this level of security and scalability. Some blockchain platforms can provide security, although you’re forced to share infrastructure with other projects. This increases congestion and transaction fees, thus limiting scalability.
Other blockchain platforms offer independent blockchains but leave you to your own devices when it comes to security. This is especially troublesome if you’re using a Proof of Work (PoW) consensus mechanism, since most projects generally do not have a high enough hashrate to protect themselves from 51% attacks. Without security, scalability is completely irrelevant.
THE INDEPENDENCE AND FLEXIBILITY YOU NEED
Blockchains created on Komodo are completely independent in the sense that what happens on one chain cannot and will not affect any other chain in the ecosystem. This is true because, unlike other platforms, chains launched on Komodo do not share infrastructure or networks.
As a result, there is no need to worry about congestion on Komodo Platform. There will never be an increase in the fees or length of time required to complete a transaction.
Moreover, projects built on Komodo may migrate away from the platform at any point in time. If, at any point in time, you feel that another platform is better-suited for the needs of your project, you are free to leave. Every blockchain launched on Komodo is the property of those who created it. There is no vendor lock-in on Komodo Platform.
Finally, every project effectively receives a clone copy of the KMD chain, so as Komodo continues to innovate new technologies, every chain in the ecosystem receives all of the additional enhancements and features. This lets you build on Komodo with peace of mind.
Future-proof your project by building on the world’s premier blockchain platform: Komodo.
CREATE A CUSTOMIZABLE BLOCKCHAIN WITH MAXIMUM FLEXIBILITY
  1. Customization — choose from optional modules to build a tailor-made solution
  2. Scalability — scale on demand to keep up with your project’s growth
  3. Independence — no shared infrastructure, blockchains, or networks
Komodo Assetchain Features
New Features In Testing & Development
ACCELERATE TIME TO MARKET WITH KOMODO’S WHITE-LABEL SOLUTIONS
Once you’ve created your very own secure, scalable, independent blockchain, Komodo offers several white-label apps to help you go to market faster. A multi-coin cryptocurrency app, an atomic-swap-powered decentralized exchange app, and a decentralized crowdfunding app are all included in Komodo’s Blockchain Starter Kit.
WHITE-LABEL MULTI-COIN WALLET
After your blockchain is operational, users will need somewhere to store that chain’s tokens. However, it can be difficult and expensive to have a new coin or token integrated into an existing crypto wallet. Developing a native crypto wallet is also a long and costly process.
That’s why Komodo provides every project with the option of a white-label multi-coin wallet app. Not only will users be able to store your chain’s tokens in it, they will also be able to store other popular cryptocurrencies like Bitcoin, Litecoin, ZCash, and KMD, Komodo’s native coin.
WHITE-LABEL DECENTRALIZED EXCHANGE
In addition, Komodo offers every project the choice of a white-label decentralized exchange app. Komodo’s decentralized exchange (DEX) will provide the backend tech necessary for the white-label app to function.
Komodo’s DEX is the world’s only truly decentralized exchange. While many exchanges claim to be decentralized, they still use proxy tokens, force users to give up their private keys at some point in the trading process, or give admin a backdoor option to freeze a user’s funds. By contrast, Komodo’s DEX is fully-powered by atomic swap technology.
Atomic swaps are peer-to-peer exchanges of cryptocurrency that allow users to retain control of their private keys throughout the entire trading process. As this method of trading occurs wallet-to-wallet, the need for centralized exchanges or other third parties is eliminated.
If a project built on Komodo uses the white-label decentralized exchange app, their blockchain’s tokens will be integrated into the DEX, providing instant access to liquidity. This is an enormous benefit, as many centralized exchanges charge exorbitant fees for listing a new coin or token.
WHITE-LABEL DECENTRALIZED CROWDFUND APP
The final white-label app included in Komodo’s Blockchain Starter Kit is a white-label crowdfunding application. This app is also powered by Komodo’s industry-leading atomic swap technology.
Crowdfunds launched on Komodo Platform are therefore more secure and much faster than a traditional, centralized ICO. Investors maintain possession of private keys throughout the crowdfund. Once the atomic swap is complete, they receive your chain’s tokens instantly.
Komodo’s Blockchain Starter Kit is designed to give you the products and technology you need to accelerate time to market and allow you to focus on ensuring that your project is a success.
INVESTMENT PROTECTION: A VISION FOR A GLOBAL BLOCKCHAIN ECOSYSTEM
The blockchain industry is currently developing at a breakneck pace. For this reason, it is absolutely essential to build on a platform that continues to evolve. At the rate the blockchain industry is currently moving, every platform must continue to evolve or face extinction.
With a long-term vision and a strong commitment to continuing development, Komodo Platform provides the investment protection you need to build comfortably.
Over the last several years, Komodo has been in a constant state of development. Komodo has completed more GitHub commits than any other blockchain project in existence. As Komodo is constantly innovating new technologies at the cutting-edge of the industry, you can build on Komodo Platform without worrying about your project falling behind.
With a clear vision for a global blockchain ecosystem, Komodo is leading the blockchain sphere by developing and implementing solutions to some of blockchain’s most pressing problems. In particular, Komodo is advancing blockchain technology with respect to these five essential features: security, scalability, interoperability, privacy, and simplicity.
Komodo’s unique dPoW security mechanism protects the entire ecosystem with the power of the Bitcoin hashrate. With the ability to launch several chains to meet the performance demands of any project, Komodo is also the world’s most scalable blockchain platform.
Atomic swap technology, pioneered by Komodo Platform, was the first major development towards interoperability. Komodo’s DEX is the world’s most advanced with over 110,000 atomic swaps completed. Users exchange tokens directly with other users, from one wallet to another.
Now, Komodo is advancing interoperability with an innovative new feature that allows thousands of chains to process transactions simultaneously while cross-notarizing and allowing inter-chain transaction proofs. This technology is still in development but will make Komodo a fully-interoperable ecosystem and allow as many as 1 million transactions per second.
Komodo also provides hybrid privacy solutions, such as permissioned and permissionless blockchains as well as optional zero-knowledge transfers of value to protect user privacy.
These end-to-end blockchain solutions are readily available with the simplicity of white-label apps and with support from expert third-party service providers. Get started with Komodo now.
BEGIN BUILDING ON KOMODO PLATFORM TODAY
If you’re ready to implement blockchain solutions, there are two certified third-party Komodo Solution Integrators that can help you navigate your journey into blockchain technology.

Chainmakers

https://chainmakers.co/
[[email protected]](mailto:[email protected])
Twitter: https://twitter.com/kmdchainmakers
Discord: https://discord.gg/Q35CHb
Github: https://github.com/chainmakers

ChainZilla

https://www.chainzilla.io
[[email protected]](mailto:[email protected])
Twitter: https://twitter.com/chainzillaio
Discord: https://discord.gg/G4dxgmv
Github: https://github.com/ChainZilla
submitted by Daniel-C-Pigeon to komodoplatform [link] [comments]

An in-depth overview of different mobile wallets

Disclaimer: A lot of time went into writing this and more research than I anticipated. Errors are not just possible, they are certain. If you find any mistakes, please reach out to me and I'll edit. Furthermore I know I probably missed a couple apps, there are a lot out there. If I missed a big one, then again contact me and I'll consider adding it. If you are reading this in the future, note that these apps update regularly, anything mentioned here may have changed by the time you are reading it.

What is a mobile wallet?

A mobile Bitcoin wallet is an application for a mobile device which acts as a lightweight wallet and allows you to store, send and receive Bitcoin (or other cryptocurrencies and tokens). Mobile wallets use SPV (Simplified Payment Verification) to allow wallet functionality without having to download the whole blockchain. This is very important as barely any mobile phones have enough storage space required for the full blockchain. Mobile wallets are also considered hotwallets, meaning they have an active connection to the internet. The mere fact of being 'online' allows for a number of attack vectors and as such should never be used to store large amounts. It is however not unsafe per se. Private keys are stored locally and encrypted. Some wallets keep backups of those encrypted private keys on a server of their own, and this is something to take note of, but not to fear. So without further ado, lets get to it. I focused on Android wallets, but many of the wallets mentioned here have iOS versions.

Quick overview

Name Segwit Multisig Backup Other coins Fee Choice Privacy Options Depth/Complexity
Samourai Yes No 12 word seed + passphrase No Custom A ton Advanced
Bread No No 12 word seed No 2 Options No Beginner
GreenAddress Yes Yes 24 word seed No Custom Tor Optional Intermediate
AirBitz No No Private seed No Custom-ish No Beginner
Electrum Yes Yes 12 word seed No Custom Proxy possible Intermediate
Copay No Yes 12 word seed No Custom No Beginner
ArcBit No No 12 word seed No Fixed or Dynamic No Beginner
CoinSpace No No 12 word seed BCH/LTC/ETH 3 Options No Intermediate
Simple Bitcoin No No 12 word seed No None No Beginner
Bither No No 12 word seed BCH/BCG 4 choices No Intermediate
GreenBits Yes No 24 word seed No Custom No Beginner
Jaxx No No 12 word seed A ton 3 options No Advanced
Xapo / / / / / Public /
Coinomi No No 18 word seed A ton Custom No Advanced
Mycelium No No 12 word seed No Scrollwheel Tor Optional Intermediate

Wallet Breakdown

Samourai

Samourai focusses heavily on anonymity and obfuscation. Addresses are never used more than once. When making a transaction there is an obfuscation slider. Samourai has had SegWit enabled since October. Furthermore it offers a plethora of different features, too much to sum up here. If you are an advanced crypto-user you should definitely check out this wallet and their website which explains all of the different features. The UI takes a bit of getting used to though.

Breadwallet

Breadwallet is a very simple to use, straightforward app. The UI is slick and intuitive and in-app support to basic questions is very well incorporated. This could be a good wallet for a new person to the scene. The lack of advanced features will make this app not the go-to for more experienced users. It does however feature fingerprint authentication, which is cool, as well as BCH extraction. The lack of SegWit and complete absence of custom fee's is a problem though, especially since fees have gone up during the recent BTC spike. With only 2 fee options to choose from I simply can not recommend this wallet to people who are looking to make frequent transactions.

GreenAddress

When I first started with Greenaddress I didn't like the UI, I found it a bit clumsy. So definitely not user-friendly for a beginner. On the plus side it allows a choice of 2FA settings. Furthermore it has SegWit enabled and it has some advanced features like nLockTime transactions and it offers a service for instant transactions. This all feels very Lightning Network-y, which makes sense as GreenAddress is a part of Blockstream. Our friends in the other sub will most likely have something to say about this. I'll refrain from this and just say the following: this is an advanced wallet with promising features. If they clean up their UI a bit I could see myself using this without hesitation. The fact that they have MultiSig is a big plus as most mobile wallets do not have this functionality.

AirBitz

Unlike any other wallet I fired up at that point, this app did not prompt me with a 12- or 24-word seed. Instead it made me make an account, the regular username/password combo. After some research I found that these are not stored in a local database on their end. Which means that recovering your password in case of loss like with every other username/password login method we are so used to, is not possible. It is merely a different representation of an encryption key, allowing you access to your private keys. It features some interesting stuff though, NFC-compliant transactions and Bluetooth Low Energy (BLE) for example. Clearly this app is meant to be a bridge between users and merchants and has focus on making regular in-person transactions. Thus it mimics some non-crypto related payment apps that we have. Personally, I am not a fan, but I can appreciate the design philosophy and I would't be surprised if their design model worked very well in the future with the LN or with other crypto's that focus on small payments. As for the UI, it's fairly simple, yet horribly cluttered with partnered services. Good for non-techies maybe, but not for more experienced crypto-enthusiasts.

Electrum

Much like the desktop wallet I used years ago when I first started with Bitcoin, the mobile wallet is minimal. Straightforward and without fancy colors or UI. For those of us who have known the internet before Facebook, this app will feel strangely familiar. This is a classic example of a no-nonsense wallet with the features that really matter. SegWit and MultiSig enabled. A further lack of advanced options might be a turn-off for some users out there though. I did however find the option to spend coins from unconfirmed transactions. This could be very useful in case you want to cancel out a previously stuck or erroneous transaction and ensure it's never cleared. One downside to this wallet is the very primitive way of setting a custom fee. No guidelines, scrollwheel or info. Just a simple box in which to put your fee which won't help intermediate users, only experienced users.
Edit: sidenote on the SegWit implementation by Electrum http://www.crypto-economy.net/electrum-3-0-enables-bech32-segwit-addresses/?lang=en

CoPay

Of all the apps I've tried up to this point, CoPay had the best initializing phase, succinctly explaining risk and security. I can not imagine a better intro to a wallet for a first time bitcoiner. It being of a product of BitPay, of which I am personally not a fan, I have to admit though. This app looks clean, feels fast and is easy to use. It successfully demystified MultiSig functionality in its UI and partnered services are not obtrusive in the design. Downsides are lack of fee setting possibilities and SegWit. The latter I really do not understand given their main core of business. If it wasn't for those last two points, I would not see why not to recommend this wallet.

ArcBit

This app dissapointed me a bit. It starts out of the box, not mentioning any backup seeds or tutorial on the wallet itself or Bitcoin. It has no SegWit, no MultiSig, a lack of features and whilst a backup seed can still be requested from the settings, I feel it is of the utmost importance that such a security measure is not quickly overlooked. The lack of fee management tops it off. While this wallet works just fine and looks just fine, there are too many alternatives out there with better options and functionality for me to ever advise anyone to use this wallet.

CoinSpace

CoinSpace is one of those apps that could be really cool, but completely missed the boat on some other design choices. In-app ads unless you pay 1.6$ or something. Settings hidden behind a CoinSpace login screen. It features multiple tokens though with built in conversion through ShapeShift, which could have been awesome. But the excessive ads are just a big no-no. Lack of SegWit and limited fee options make this one of the least interesting wallets out there.

Simple Bitcoin Wallet

Simple Bitcoin is a very basic, barebone wallet. Feels like a one-man project. Almost no settings possible at all. There's much better out there.

Bither

I oddly liked Bither because of its design that reminded me of websites from the 2005-ish era using lots of gradients. Its one of those apps that you either like or you don't. The UI is not bad, but could be better, there's some functionality hidden in the settings, but not enough to satisfy. One very useful feature is built in BCH and BCG extraction. This is the first app I encountered with built in Bitcoin Gold access. It also has a separate tab with just market price information, which is really useful for the price ticker addicts among us. Furthermore it features Cold/Hot Storage View which allows you to monitor cold storage and with a nice graph shows you the distribution between Hot and Cold. Cool stuff. I would suggest to check it out, I'm sure some people will like and some won't. Do note, no SegWit. I would personally use this as a view-wallet only. Not as a spending wallet.

GreenBits

GreenBits is like the light version of GreenAddress. I tried looking for why one team would make 2 wallets but could not find a definitive answer asides from GreenBits being Android-native. And while some resources state MultiSig functionality and Tor through Orbot, I couldn't find those in this app. It does however sport SegWit and custom fees like GreenAddress. On the UI front I feel much more comfortable with this app though and I could see it being better received by average users. Looks like a good spending wallet without much extra.

Jaxx

Jaxx is a rather large wallet that supports many many many different coins with built in ShapeShift functionality. It did suffer from a hack earlier this year which is why this wallet has been discredited. I would however suggest looking into this one if you are invested in multiple different coins and regularly swap between them to get some financial edge. Lack of SegWit and fee options don't make this an ideal app for Bitcoin-only users.

Xapo

Xapo, known for its cold storage solutions was one of the apps I was eager to check out. Upon starting I however first had to verify through a text message, giving up my phone number, after which I was greeted by a 'Continue with Facebook or email' - screen. Upon choosing email, I was further asked to give up personal information. Nothing personal against these types of business models, but this is not what I am looking for in a mobile wallet. Centralization of personal information is quite in contrast with the decentralized and pseudonymous qualities of cryptocurrencies. This being the 13th wallet I've fired up tonight, I decided to give this one a pass.

Coinomi

Coinomi is very similar to Jaxx in the way that it supports a crapload of different currencies and in-app conversions between different tokens through ShapeShift and additionally Changelly. It does look quite a bit more straightforward though. A good alternative to Jaxx for those multicrypto traders among us. Unfortunately yet again not the best for straight Bitcoiners due to lack of SegWit. It has custom fees though, but much like Electrum, there's no real help here and it's just a manual input.

Mycelium

Mycelium has been my wallet app for a couple years now. Unfortunately the delay in SegWit adoption has me looking elsewhere and in succession writing this article. I really liked the recent addition of the fee scrollwheel, which is still the most detailed and succesful implementation of custom fees in any app I've seen. Having tried out many other apps at this point I can now see Mycelium, while not particulary user-unfriendly, could still very much improve its UI. It is however not a bad wallet, never crashed on me, always ran smooth through multiple updates. But let's not get sentimental here, it's a solid app, but its time for me and maybe you as well to try out something different ;-)

Conclusion

In this excruciatingly long article I've ran through a couple different wallet apps. One thing to learn is that not a single one of these is perfect and there's still room for improvement on many fronts. Which wallet holds your preference today depends largely on what you are looking for in a wallet. Do you want the cheapest transactions, then go for one of the SegWit enabled wallets. Do you like cool functionality, then check out Bither. Is anonymity of a concern to you then Samourai looks like the clear winner. More into multiple coins at once, then Coinomi or Jaxx is the way to go. And this is mobile wallets only, you have your desktop wallets, hardware wallets, cold storage solutions, paper wallets. But I'm all out of ink tonight!
I can't give you specific advice. In this world of cryptocurrencies we are in control of our own money. Being in control of your own money means being responsible for its security too. So make your own decision and due diligence.
Edit: Thanks everyone for the awesome responses. I've had some requests to further mention some important information regarding the wallets. I will write these down here as a memo to myself in the future, at which point I will review the state of mobile apps in greater detail once again. - Open Source or not - iOS version or not - Adding iOS only wallet apps
submitted by Zyntra to Bitcoin [link] [comments]

Can DDoS attacks harm your server and how to prevent them?

DDoS (distributed denial-of-service) attack is one of the most common forms of cyber-attacks these days. Their scale already exceeds one terabit per second and over 2000 of such attacks are being observed daily by Arbor Networks. So, should you care? Surely! It’s important to secure your network to stay calm and ensure uninterrupted services to your customers.
Possible Harm
DDoS attacks disturb regular tasks of a targeted computer system by flooding it with bogus traffic from numerous compromised machines. As a simple example, if your e-commerce site is under DDoS attack, your customers are withheld from placing new orders. If it’s a call center, your clients cannot make or receive calls. If it’s a booking engine, your clients are not able to make new reservations. In other terms, your service is being denied. Still, can these service disruptions make a lasting impact on your system and harm your customer base? Let’s try to answer this point by point.
How to avoid DDoS?
As DDoS attacks keep growing in volume and frequency, we should prevent them from making harm to your projects. You should plan ahead to secure your network and minimize the impact of such intrusion. So how to prevent ddos attacks?
Conclusion
Hackers are getting better each day with more and more methods available for finding vulnerable systems on the Internet. Nevertheless, there are now a lot of ways to protect your business and avoid DDoS attacks whatsoever. Do not hesitate to take preventative actions in advance and you will sleep well at night.

Originally posted at https://blog.cherryservers.com/ddos-attacks-and-their-prevention
submitted by diablom1980 to devops [link] [comments]

Zcoin Development Update 27 May 2019

Zcoin Development Update 27 May 2019
https://preview.redd.it/70a0pz4j8q031.jpg?width=1200&format=pjpg&auto=webp&s=f35dc166fc79ba6887f6b60cd4a60cd6b05e2d05

Sigma

  • Feature freeze.) Release candidate aim for 7 June 2019.
  • Mints to honor coin control to review and merge
  • Confirm to add two more denominations 0.05 and 25.
    • Significantly brings down both the average and max number of mints needed to fulfill any amount as confirmed through knapsack tests.
    • 0.05 denomination is to make the lowest Sigma spend fee cheaper without tainting spends.
  • HD Mints completed and awaiting review. Allows wallet backups to include mints.
  • Completed Electrum wallet and Electrumx server Sigma support along with update to latest Electrum code. One remaining issue when dealing with re-orgs with Electrum wallet.
  • Conversion tool from Zerocoin mints to Sigma mints to be finalized by this week.
  • To complete chain reorganization regression tests
  • RPC commands for Sigma completed
  • For wallet to prompt for full reindex if upgraded after Sigma has upgraded.
  • For DDoS or inflation protection purposes to enforce consensus limits for Sigma spends
    • Per transaction 35 spends or 500 xzc
    • Per block 50 spends or 600 xzc
  • Features that won’t make it into first mainnet release but will be added on later
    • Batch verification of Sigma spends
    • Showing total amounts of unspent mints in each denomination

Exodus


  • Exodus is Zcoin’s smart asset token layer that is based off Omni
  • Discussion on implementing Sigma features in Exodus layer allowing smart assets to also have Sigma feature set. This means that tokens can be issued on Zcoin’s blockchain with privacy features
  • To look into ideal OP_return script size limit for this feature.

Znodes


  • Confirm Chainlocks to be implemented during Znode code upgrade for 51% attack protection. To be worked on after Sigma deployment.
  • To look into Znode creation wizard to simplify process

MTP


  • New ccminer release is faster than CryptoDredge with OhGodAPill. Matches T-rex but slower in 20 series Nvidia GPU.
  • To look into changing the way memory is accessed for further speed ups.

Research


  • Research is to keep up to date on improvements in the space and understanding developments in blockchain. Does not necessarily lead to improvements to Zcoin.
  • Review Spartan
  • Review RingCT 3.0
  • Review Sonic
  • Exploring some ideas to scale Lelantus
  • Understanding FloodXMR. Current status is Monero Research Labs is in contact with authors of paper to ascertain accurate costs.
  • Quadratic voting and how it may be applicable to Zcoin governance structures
  • Dynamic Znode collaterals
submitted by Muggles_XZC to zcoin [link] [comments]

Vertcoin 2018 Roadmap and 2017 review

https://medium.com/vertcoin-blog/2017-in-review-2018-roadmap-d4ba51b29da3
2018 Roadmap
2017 Review
submitted by Jamatu to vertcoin [link] [comments]

How to Install the Genuine Electrum Bitcoin Wallet (and ... 09 - myNode series - Using Electrum with Electrum Server How To Use Electrum Bitcoin Wallet Link in description How to create an Electrum wallet on your computer Install Electrum Nav Coin Wallet - Linux Ubuntu - Wintel Pro Z8300

Electrum Wallet, without a doubt, tops the charts whenever there’s any discussion pertinent to the best Bitcoin wallets. We’ve mentioned time and again its security features, compatibility and everything else are just in sync with what you wish to see in any Bitcoin wallet you entrust your funds with. Electrum ist ein schnelles Wallet, da es Server benutzt, die die Bitcoin Blockchain indexieren. Und als Light Wallet ist es durch das Netzwerk von Bitcoin nicht eingeschränkt. Wichtig ist zum Beispiel auch die Kompatibilität mit Hardware Wallets: Electrum unterstützt die Hardware Wallets Ledger, Trezor und Keepkey. Kombiniert man ein Hot mit einem Cold Wallet, sorgt das für vielfach ... Electrum is a lightweight Bitcoin client, based on a client-server protocol. It was released on november 5, 2011. Main features: Encrypted wallet: the file that contains your bitcoins is protected with a password. You are protected from thieves. Deterministic key generation: If you lose your wallet, you can recover it from its seed. You are protected from your own mistakes. Instant on: the ... Electrum Bitcoin Wallet. Impressum This website is hosted by Electrum Technologies GmbH Electrum Technologies was founded by Thomas Voegtlin in 2013. Its mission is to develop, package and distribute Electrum software, and to provide services to Bitcoin users and businesses. Bitcoin Wallet Review – Electrum JP Buntinx March 3, 2017 Reviews , Wallet When it comes to finding the right mobile bitcoin wallet, it appears the number of choices is seemingly limitless.

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How to Install the Genuine Electrum Bitcoin Wallet (and ...

In this video, I take you through the download of Electrum Wallet and hooking it up with your Electrum Server. I also take you through using your hardware wallet with Electrum Wallet. MIT Bitcoin Expo 2019 ... Electrum Personal Server (v0.1.5) - Duration: 13:56. 402 Payment Required 3,385 views. 13:56. Cobo Vault Review Military Grade Cryptocurrency Hardware Wallet - Duration ... Cold Storage. Sign transactions from a computer that is always offline. Broadcast them from a machine that does not have your keys https://electrum.org Electrum is one of Bitcoin's most popular ... The CryptoDad shows you how to download and install the genuine Electrum Bitcoin wallet. Check description below for table of content links! I talk about how... How to use electrum bitcoin wallet How to use the electrum bitcoin cryptocurrency wallet, here this 30 min video will show you how to use the wallet and set your preferences. There is also ...

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