generate wallets in exchanges like binance? - Bitcoin ...

Bitcoin / Cryptocurrency Security Is It Possible to Add a Second Layer?

I am kind of new to crypto, less than 1 year. Recently I am playing with Ledger Nano S. I understand that we can openly share the public key, like the bitcoin address. Because there is no way to extract private key from public key.
I understand that I have the back up for my private keys. But still don't feel very safe.
I mean, let's say, by any chance, someone stole my back up phrase, then they can easily steal my crypto and I don't even know it until I check my balance. I know I have to keep my back up phrase safe and private, but there is a chance right?
Other than that, what if, by such a small probability that someone draw 24 random words from BIP39 word list, and it happens to be the same with my back up phrase? I know the probability is very very very low, but still, not 0, right?
I am thinking that, is it possible, in future, crypto like bitcoin, incorporate another layer of security besides private key witness, for example, when anybody move my bitcoin with my private key (I mean the move on blockchain, not within exchange), I will receive an email notification immediately, which has an approval link. Without clicking the approval link, my crypto still can not be spent although it was signed by private key. Just like withdraw from binance or coinbase. Google authenticator is the first layer, the link in email is the second layer. Is it possible in the near future? Or any crypto work like this way please?
submitted by chilianlin87 to Bitcoin [link] [comments]

Ferrum Network Community Update — December 8, 2019

Dear Community,
What an exciting and jammed pack few weeks it has been — with the launch of staking, the 2Key Network partnership, and a major Kudi update — to name a few!
But as the profile of Ferrum continues to grow, it is essential we never stray from the fundamentals that got us this far: hard work, transparency, and a commitment to community.
In this community update, we provide a recap of the last few weeks, and look ahead to a few initiatives we are planning.
Business Update
With the release of the FRM Flexible Staking platform, we took that opportunity to kick the marketing into high gear. These marketing efforts paid off, and we were fortunate to be picked up by top influencers like Teh Moonwalker, Oddgems, and Micro Cap Gems. Here’s what happened the past few weeks.
Tech Update
For those who missed the Tech Update from our CEO Naiem Yeganeh, PhD, here are some highlights:
First Kudi Update
The First Kudi team on the ground in Nigeria continues to make significant progress.
What’s Next
It is critical we capitalize on the attention we have garnered from the team and community efforts, and to start 2020 with a bang. Here are some of the upcoming initiatives we are working on.
Flexible ERC-20 Staking v0.2
We are strongly considering launching another round of staking. We are taking the lessons learned from the first round and improving the experience. Community feedback will be key to make version two even better, so expect to see a series of polls in the coming days.
A Trading Community
A strong group of FRM traders who post technical analysis on social media is great for exposure and great for liquidity. We are currently laying the groundwork to build a trading community to come up with initiatives like trading competitions and special trading rewards. Anyone interested in joining such a community should PM Ian on Telegram.
FRM on Kudi
We have been working hard to add FRM and ETH to the Kudi app so our users can buy it directly with Naira. This will also open up additional utilities for the FRM token, including a premium membership program that will reward users for holding the token and using the app. More details to follow.
Expansion into other Markets
As you may know, one part of our business model is to partner with top notch teams in emerging markets where our fiat gateway + payments app technology can be successful.
We are happy to report that we have started to work with such a team in Brazil and they are in the early stages of launching their own product powered by Ferrum Network. More news to follow.
Conclusion
Thank you all for your continued support of Ferrum Network. 2019 was a really special year that we will never forget. But together we can make 2020 even better!
Very truly yours,
The Ferrum Network Team
Ferrum Network Links:
Website: https://ferrum.network/
Telegram: http://telegram.ferrum.network
Twitter: http://twitter.ferrum.network
LinkedIn: http://linkedin.ferrum.network
YouTube: http://youtube.ferrum.network
Reddit: http://reddit.ferrum.network
Bitcoin Talk: http://bitcointalk.ferrum.network
Facebook: http://facebook.ferrum.network
Github: https://github.com/ferrumnet/
Instagram: http://instagram.ferrum.network
submitted by tentbobert to FerrumNetwork [link] [comments]

Groestlcoin September 2019 Development Release/Update!

For a more interactive view of changes, click here
In our current world; bordering on financial chaos, with tariff wars, Brexit and hyperinflation rife, you can count on Groestlcoin to consistently produce innovation that strikes to take the power away from the few and into the many, even after a full five and a half years of solid development.
Here is what the team has already announced in the last 3 months since the last development update:

What's Being Released Today?

Groestl Nodes

What am I?

Groestl Nodes aims to map out and compare the status of the Groestlcoin mainnet and testnet networks. Even though these networks share the same protocol, there is currently no way to directly compare these coins in a single location. These statistics are essential to evaluate the relative health of both networks.

Features

Source - Website

Groestlcoin Transaction Tool

What am I?

This is a tool for creating unsigned raw Groestlcoin transactions and also to verify existing transactions by entering in the transaction hex and converting this to a human-readable format to verify that a transaction is correct before it is signed.

Features

SourceDownload

Groestlcoin AGCore

What am I?

AGCore is an Android app designed to make it easier to run a Groestlcoin Core node on always-on Android appliances such as set-top boxes, Android TVs and repurposed tablets/phones. If you are a non-technical user of Groestlcoin and want an Android app that makes it easy to run a Groestlcoin Core node by acting as a wrapper, then AG Core is the right choice for you.

What's Changed?

Source - Download

Groestlcoin Electrum

What's Changed?

Android Electrum-Specific

OSXWindowsWindows StandaloneWindows PortableLinux - Android
Server SourceServer Installer SourceClient SourceIcon SourceLocale Source

Android Wallet – Including Android Wallet Testnet

What am I?

Android Wallet is a BIP-0032 compatible hierarchial deterministic Groestlcoin Wallet, allowing you to send and receive Groestlcoin via QR codes and URI links.

V7.11.1 Changes

Groestlcoin Java Library SourceSource - DownloadTestnet Download

Groestlwallet

What am I?

Groestlwallet is designed to protect you from malware, browser security holes, even physical theft. With AES hardware encryption, app sandboxing, keychain and code signatures, groestlwallet represents a significant security advance over web and desktop wallets, and other mobile platforms.
Simplicity is groestlwallet's core design principle. Because groestlwallet is "deterministic", your balance and entire transaction history can be restored from just your recovery phrase.

iOS 0.7.3 Changes

Android v89 Changes

iOS SourceAndroid Source - Android DownloadiOS Download

Groestlcoinomi Released

What am I?

Groestlcoinomi is a lightweight thin-client Groestlcoin wallet based on a client-server protocol.

Groestlcoinomi v1.1 Desktop Changes

Groestlcoinomi Android v1.6 Changes

Groestlcoin Java Library SourceAndroid Source
Android DownloadWindows DownloadMac OS DownloadLinux Download

Groestlcoin BIP39 Tool

What's Changed?

Source - Download
submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

A cryptoforker's guide to free money - Part 1 (The holy ymgve script + what and where to exchange)

EDIT: a new version of this guide, multilingual and featuring a wallet checker (input your IP, see what you can fork and how much it is worth) is available at https://cryptodom.org

Hello my lovely forkers!
A while ago I made a post A cryptoforker's guide to free money - Part 2 (Coinomi, Bither, Bitpie, Walleting Services) where I explained how I used a combination of COINOMI and BITPIE (together with DIG WALLETING SERVICES) to get hold of most forked coins - And then how I sold them (main sites used: GATE.IO / BTCTRADE.COM / BIT-Z.COM / EXRATES.ME / COINEX.COM). Please refer to that for the instructions regarding Bither and Coinomi.
QUICK NOTE: If you are a seasoned forker, just look at point 4 and see if your pokem… I mean fork coins collection is complete :-p / If instead you are a total newbie, remember you can just do the “PREPARATION” part and then claim through DIG WALLETING (affiliate link: https://dig.walleting.services/#/aff/o5YP75ALDORdaAbmrJJx NON affiliate link: https://dig.walleting.services/# ) if the process is too hard/long/risky - these guys are reliable and provide a great service, especially for those who have a plethora of transactions and would need to hunt down every last key manually - they have a Reddit, too: you can reach them at Walleting_Services .
BEFORE YOU START: What is a fork? Is it really free money? Imagine you had a bank account at BTCbank and a card for it. Tomorrow BTCbank splits and half of its branches become BTC2bank. Nothing changes for you as a client of BTCbank, however there is something you can now do. You can move your money from your BTCbank account to a new BTCbank account, in practice making the card for your former account useless in the BTNbank branches but… NOT IN THE BTN2bank branches! So you can go there and get the equivalent of what you had in “free” money. Nothing illegal, nothing shady, no bugs or exploits: it’s all there by design. Keeping with the example though, it should be specified that you must have the “card” of your BTCbank, which in this case is a private key. If you have your BTC stored on papehardware wallet or anywhere else where you are in direct control of your private keys, well done! Those keys are your BTCbank card(s). If, on the other hand, you held your money on an exchange (Binance, Bitfinex, Bittrex, you name it), then your only chance is to wait and hope that the exchange decides to support the coin and gives you your share. It’s not impossible but it introduces a middleman. It’s like you are asking your uncle to have an account in his name at BTCbank and there is no guarantee that uncle will go to a new branch of BTNbank2 and use the card trick to get the free money and give it to you, no matter how much you ask him to. He could do it, he could not: it’s uncle’s call.
PREPARATION: First of all, a question: are you after the fork money to exchange it yourself or do you just want to claim it but want someone else to do all the exchange part for you? If you want to squeeze every last bit out of it, get ready to sign up to a few Chinese exchanges! You might as well do this now before you start, otherwise you’ll get stuck at the cashing part. Same goes for the script. No target address, no script. I warned you :) Anyway, here’s the list: • GATE.IOBTCTRADE.IMCOINEX.COMEXRATES.METRADESATOSHI.COMBIT-Z.COM
My personal favourite is GATE.IO, despite the 60 confirmations (up to 14 hours), but they all helped me one way or another, and most importantly they all allow withdrawal (BTCTRADE.IM wanted verification papers, the others didn’t). Also, make sure to have Coinomi, Bither and Bitpie installed on an Android phone.
STEP 1 - THE GOLDEN RULE Just like in the previous post, let me start off by warning everyone: what are you about to do is dangerous. You could lose your bitcoins. Are you scared? You should be, cause the threat is real. Nobody wants to lose 1 BTC to try and claim a few tens/hundreds of dollars, right? So, first and foremost, make sure that you MOVE your coins from wherever they are (ideally, an offline wallet like a ledger or a trezor), and then, once the wallet is empty, feel free to play around with its private keys, that will hopefully show some transferrable balance at the time of the fork.
STEP 2 - GETTING YOUR KEYS - https://iancoleman.io/bip39/
For getting the keys, this is your number one option - with an offline version for paranoid available, no less. Use the seed (those 24 words in the case of ledger, for example) and after the calculation go get your keys in the chart at the end of the page. In case you have segwit addresses or special scenarios (like a wallet with a lot of operations over a long time), getting the keys, or the “right” keys, might take a while. Anyway: let’s look at the first line of the chart. In the first column you will find the address: copy and paste it onto https://blockchain.info/ and press enter to get the transaction history for that given address. Let’s suppose for the sake of this example that our address shows 2 transactions: one inbound for 2 BTC 1 year ago and anther one for the outgoing BTC 5 minutes ago (because before we started this we DID move them out, right?!?). What that means is that at the time of the forkS (in this case we’d get money from most of them) we had 2 BTC on that address. Great, so it’s loaded, and we need its key. Let’s go back to the chart on line one and let’s have a look at the third column: this is our private key. We will use it later to sweep or import in the various method outlined.
STEP 3 - THE SCRIPT - https://github.com/ymgve/bitcoin_fork_claimer
If you have ben around this subreddit long enough you surely read about the script… And spared a tender thought for ymgve who made this possible. Yet, no one really explains properly how to use it. Unfortunately I do not have the time to explain how to get python installed and running on a machine, you will have to figure it out on your own. Same goes for the fact that you might need to write “py” or “python” before the actual “claimer.py (…)” command. Let’s say you somehow get ready to run the script - now you do have a series of examples on the github page, but they are not so easy to understand for the uninitiated. Here is the relevant quote:
In blockchain.info mode it uses the blockchain.info API to query and validate information about the transaction you're spending from. This only works for transferring/claiming coins that existed on the BTC main chain pre-fork. SYNTAX: * claimer.py * EXAMPLE CLAIMING BTG - BITCOIN GOLD: * claimer.py BTG 4adc4(...) 5K2Y(...) 1HKqKTM(...) 1aa5cm(...)*
Let’s have a look at the example and remember what we did before in the “preparation” and “getting your keys” sections. In the former, we signed up at the exchanges so we now have the relevant deposit addresses, right? So let’s say we want to get fork XXX : let’s look for a deposit address of XXX and let’s call it DEPOXXX - Next, (hello, blockchain.info – here’s my wallet address from column one) we’ll look for the transaction ID (TRANSXXX) of the wallet (WALLETXXX) we have the private key of (PRIVATEXXX). We have it all now, so our script will be:
claimer.py XXX TRANSXXX PRIVATEXXX WALLETXXX DEPOXXX
Admittedly, there is a more complicated method for FBTC and also some kind of manual mode to transfer just parts of the sum and set the transaction fees, if you need those, good luck :)
Also, I was contacted by ottoteixeira who reminded me he created a very useful script (I actually used it during my first attempts) - What it does is to create the scripts to run on ymgve's script. A script for the script, right - sounds complicated but it actually makes your life easier once you understood what you are doing. Give it a try: Otto's script - (requires minimal coding skills to edit the file with your own data)
STEP 4 - WHICH EXCHANGE FOR WHAT? SCRIPT/APP CLAIM:
BCH/BTG - Claim with Coinomi, move to Binance
SBTC/BCD - Claim with Coinomi, move to gate.io
CLAM/BTX- Claim with Coinomi, move to bit-z.com
BTP/BTN/BTW/BTF - Claim with Bither and exchange with Bitpie (move them to the bitpie bank once they cleared to be able to trade on the exchange)
B2X - Claim with script straight to exrates.me
BPA- Claim with Bither, no exchange accepting deposits so far
BTW - Claim with Bither, move to btctrade.com
BPA - Claim with Coinomi, no exchange accepting deposits so far
UBTC - Claim with script, send straight to btctrade.com
CDY - Fork of BCH, untested but should work with script straight to bitpie
BTV - Claim with script straight to coinex.com or bit-z.com
OTHERS:
LBTC - Claim with the online wallet (http://lightningbitcoin.io/ ) (download, run, sweep keys) - can be traded through cryptosnake
LCH - Claim with online wallet (https://litecoinca.sh/#download ) (download, run, sweep keys) - can be traded on tradesatoshi.com
BTCP – I haven’t claimed it yet but some people seem to have made it. To keep up with the news, I follow the #bitcoinadrops discord channel, they talk about it and they are hilarious ☺
UPDATE: Can be claimed with Coinomi (only non segwit though, so I can't test at teh moment). Many successful reports of claiming already. First price I've seen was 0.002 - seems low compared to the hype. I was hoping for 0.02 :-p
NO LUCK HERE:
BCK/BTSQ/BTT/WBTC - Claimable through the script apparently, I haven’t tested cause I have no target address
BTH/BCX - I am yet to find an address where to send them to :(
STEP 5 - FINAL NOTE: Oh no! After 2 days of python, apps, furious coin creation and shady Chinese exchanges you are done. Bonanza is over. Not quite! Here is a little reminder of where to find the info you want and need about the forks -
• cryptodom.org - start from here, always
BitcoinAirdropsTrades - end up here if you are the kind of person who wants to pre trade forks the moment the wallet hits Github :)
And that is all, folks :) Feel free to ask me questions if you are stuck or something is not clear, and I will try my best to answer you. If I helped you, feel free to tip your humble fellow forker here—>
•BTC tip jar: 1BEAADXCk3ng2ZRsinHmwVyZQf1Vu9AcDj
•LTC tip jar: LYT1sbotLuUtU5v5r9uEu61xoGpJ1s4aau
Oh and one last thing… I did help 4 people to sell some of their forked coins, two of them from Reddit. They are binsone and whospumpin. A lot of people are helping, I know… camku Playboy_BTC cryptosnake eliteluxurytrades - Personally I used cryptosnake twice and he was fair and square with me: honestly, all these guys can do some coins I do not handle (LBTC / LCH and even BTCP) - but hey, I am still your favourite one cause I showed you how to do it yourselves, no? So if you are being lazy, let me work for you and let’s share your profits at the usual rate of 5% (over 2k) / 10% (less than 2k) commission :-)
submitted by crytposhadow to BitcoinAirdrops [link] [comments]

Groestlcoin Release September 2018

Introduction

As always, the past 3 months since 22nd June have been crazy busy. The bears might still be around, but the show must go on and of course has not slowed the Groestlcoin development team in the slightest. Here’s a quick overview of what has already happened since the last release: - Integrated into the bitbns exchange, with the ability to buy Groestlcoin directly with the Indian Rupee. - Groestlcoin Rebrand Vote – Whilst there was much talk and push for a rebrand vote, the overall result was almost unanimously in favour of keeping our unique and conversation-starting name. With just 83 votes to Rebrand, and 2577 votes to No Rebrand. Thank you for all who voted, the funds raised are being used to fund ongoing hosting and development costs. - Integrated into the Cryptobridge exchange. Cryptobridge is a popular decentralised exchange where you always hold the private keys to your funds, only YOU have access to them. - Groestlcoin has been added to SimpleSwap – Groestlcoin can now be swapped with over 100 other cryptocurrencies, without signing up! - Groestlcoin has been added to UnoDax, one of the leading cryptocurrency exchanges in India, with TUSD, BTC and INR trading pairs. - Groestlcoin has been added to SwapLab.cc, where you can buy Groestlcoin using Bitcoin and over 50 other altcoins. Purchasing with VISA/Mastercard is coming VERY SOON. Discussed later: - Groestlcoin has been listed on #3 largest exchange in the world on volume, Huobi Global! More on this to come further on in the announcements. - Groestlcoin has been added to the Guarda Multi-Currency Wallet. - Groestlcoin has been added to Melis Multi-Device, Multi-Account, Multi-Platform, Multi-Signature advanced wallet! Already this list is far more than most other cryptocurrencies have achieved in the past 3 months. But this is just the tip of the iceberg of what has been developed.

What's been Happening?

GRSPay Released

We are so excited for this, that it has it's own separate reddit thread. Head over there now at https://www.reddit.com/groestlcoin/comments/9ikr5m/groestlcoin_releases_grspay/? to see more on this!
https://www.melis.io/assets/logo-navbar-4b6f0d372f15b2446d3fa4c68f346e4fb08ee113941186cee58fd6135f3f8b7d.svg

Melis Wallet

The the most advanced wallet for Bitcoin, Bitcoin Cash, Litecoin and now Groestlcoin.
With Melis you have the complete control of your bitcoins and private keys, you can define spending limits policies and make use of two or more factors authentication. Melis is open source, published on GitHub.

How Melis Works?

You can create as many accounts as you want. An account is a part of your wallet that can be customised to your requirements. You can choose how many co-signers are required to spend funds. The accounts are completely independent and act like separate wallets from each other but can be accessed via the same details. A core feature of Melis is the ability to set a ‘primary’ device. With this you can set an account as ‘Secure’ so it is only viewable (and accessible at all) from the Primary device. You can have a savings account hidden from the outside world whilst also having your ‘spending’ funds available on the go. With Melis you can create a multi-signature account between N people, where up to N signatures are required to sign a transaction, choosing if any of those should be mandatory.
Core Features:
https://guarda.co/assets/images/1PGo4ID.svg?1537791124643

Guarda Wallet

Safer than ever! Desktop Light Wallet - Anonymous and fast!
With Guarda Multi-currency Desktop Light Wallet you don’t need to register. Guarda has no access to your private keys or funds. You can receive, send, store, buy and exchange cryptocurrencies in complete anonymity and safety. All these features are available on Linux, Windows or MacOS. Choose the one that suits you!
More info about Guarda wallet on www.guarda.co
https://holytransaction.com/images/logo.png

Integrated into HolyTransaction

What is HolyTransaction?

HolyTransaction gives users access to the crypto world with a universal cryptocurrency wallet and instant exchange.

Features

For more information, visit Holy Transaction here.
https://www.groestlcoin.org/wp-content/uploads/2018/09/next-grs-groestlcoin.jpg

Integrated into NEXT Wallet

What is NEXT?

NEXT is a modern, next-generation stylish open-source Desktop wallet.

Features

For more information, visit NextWallet here.
https://blockchainfinancial.com/mediaserve2018/09/admin-06143647-bcf_logo_vec_256x256.png

Integrated into Blockchain Financial

What is Blockchain Financial?

Blockchain Financial is a set of web based services for individuals and companies that want to make things happen with the Cryptocurrencies Ecosystem. - For those that don't know anything about cryptocurrencies, we offer tools that will let them receive, send and operate with an assortment of coins. - For those that are already riding the wave, we offer tools that will let them do all those things that they weren't able to do.

Blockchain Financials mission

We're not here to reinvent the wheel. We're here to make it run smoother for you, and we provide some of the most useful services you'll find on the internet, made in a way that is easy to understand and use on a daily basis. In short, we're a bunch of people that claim to be Crypto Evangelists. We strongly believe in cryptocurrencies, and our main promise is to push them up so more people get involved and take all the advantages they offer.

More information from Blockchain Financial

Back in 2014, the world was taken by storm when Facebook approved the first cryptocurrencies tipping apps. The first was for Dogecoin, and the second was for multiple coins.
The project was hosted on whitepuma.net, and persisted for almost two years, built up a massive user community and gave a home to Bitcoin, Litecoin, Dogecoin and dozens of other bitcoin-based altcoins.
After very active months, the tipping hype started to fade away. Then, the developers decided to jump into the next stage: bringing not only tipping, but also mining and a widget that could be embedded on websites to allow everyone to accept payments. Sadly, the work was never completed because the project started to require an unsustainable amount of resources. Then, in a painful decision, a shutdown was announced by December 2015.
A couple of months after whitepuma.net was closed, the source code was released by its creator as Open Source on GitHub. But it wasn't maintained.
Now, some of the original members of the dev and admin teams gathered up with a handful of the WhitePuma's elite users, and decided to make something good with the best pieces of the old source code. That, with fresh new ideas and the power of the BardCanvas engine, synthesized the core of Blockchain Financial.
More info about Blockchain Financial wallet on .
For more information, visit [Blockchain Financial](www.blockchainfinancial.com)
https://www.huobi.com/image/logo.aeb4723.svg

Groestlcoin Listed on Huobi

Who are Huobi?

Huobi was founded in China and is now based in Singapore, with offices in Hong Kong, South Korea, Japan and the North America, currently sitting #3 in volume on Coinmarketcap. Huobi is a great leap forward for our growing presence in Asia and we are very excited to be listed here!
You can find the official Huobi announcement here.

Groestlcoin Core v2.16.3 - Please Update ASAP

A new major Groestlcoin Core version 2.16.3 is now available for download which includes both a Denial of Service component and a critical inflation vulnerability, so it is recommended to upgrade to it if you are running a full Groestlcoin node or a local Groestlcoin Core wallet.
v2.16.3 is now the official release version of Groestlcoin Core. This is a new major version release with a very important security updates. It is recommended to upgrade to this version as soon as possible. Please stop running versions of Groestlcoin Core affected by CVE-2018-17144 ASAP: These are 2.13.3 and 2.16.0.
As a result in this, all exchanges and services have been asked to upgrade to this version, so please be patient if wallets go in to maintenance mode on these services.

What's new in version v2.16.3?

This is a major release of Groestlcoin Core fixing a Denial of Service component and a critical inflation vulnerability (https://nvd.nist.gov/vuln/detail/CVE-2018-17144) exploitable by miners that has been discovered in Groestlcoin Core version 2.13.3 and 2.16.0. It is recommended to upgrade to 2.16.3 as soon as possible. If you only occasionally run Groestlcoin Core, then it's not necessary to run out and upgrade it right this second. However, you should upgrade it before you next run it. If you know anyone who is running an older version, tell them to upgrade it ASAP. Stored funds are not at risk, and never were at risk. At this time we believe over half of the Groestlcoin hashrate has upgraded to patched nodes. We are unaware of any attempts to exploit this vulnerability. However, it still remains critical that affected users upgrade and apply the latest patches to ensure no possibility of large reorganizations, mining of invalid blocks, or acceptance of invalid transactions occurs.

The Technicals

In Groestlcoin Core 2.13.3, an optimization was added (Bitcoin Core PR #9049) which avoided a costly check during initial pre-relay block validation that multiple inputs within a single transaction did not spend the same input twice which was added in 2012 (Bitcoin Core PR #443). While the UTXO-updating logic has sufficient knowledge to check that such a condition is not violated in 2.13.3 it only did so in a sanity check assertion and not with full error handling (it did, however, fully handle this case twice in prior to 2.1.0.6). Thus, in Groestlcoin Core 2.13.3, any attempts to double-spend a transaction output within a single transaction inside of a block will result in an assertion failure and a crash, as was originally reported. In Groestlcoin Core 2.16.0, as a part of a larger redesign to simplify unspent transaction output tracking and correct a resource exhaustion attack the assertion was changed subtly. Instead of asserting that the output being marked spent was previously unspent, it only asserts that it exists. Thus, in Groestlcoin Core 2.16.0, any attempts to double-spend a transaction output within a single transaction inside of a block where the output being spent was created in the same block, the same assertion failure will occur. However, if the output being double-spent was created in a previous block, an entry will still remain in the CCoin map with the DIRTY flag set and having been marked as spent, resulting in no such assertion. This could allow a miner to inflate the supply of Groestlcoin as they would be then able to claim the value being spent twice.
Groestlcoin would like to publicly thank Reddit user u/Awemany for finding CVE-2018-17144 and reporting it (https://lists.linuxfoundation.org/pipermail/bitcoin-core-dev/2018-Septembe000064.html). You deserve gratitude and appreciation from cryptoworld, and you have ours. If you want to support him for his work, please consider donating to him on his bitcoin cash address: bitcoincash:qr5yuq3q40u7mxwqz6xvamkfj8tg45wyus7fhqzug5
http://i.imgur.com/3YhyNZK.png

Groestlcoin Electrum-GRS 3.2.2 - Ledger & Trezor Edition

What is Electrum-GRS?
Electrum-GRS is a lightweight "thin client" groestlcoin wallet Windows, MacOS and Linux based on a client-server protocol. Its main advantages over the original Groestlcoin client include support for multi-signature wallets and not requiring the download of the entire block chain.

Changes:

http://i.imgur.com/3YhyNZK.png

Electrum-GRS Mobile Android

What is Electrum-GRS Mobile?

Electrum-grs is a lightweight "thin client" groestlcoin wallet Android based on a client-server protocol. Its main advantages over the original Groestlcoin client include support for multi-signature wallets and not requiring the download of the entire block chain.

Changes

Groestlcoin EasyVanity Released

Groestlcoin EasyVanity is a Windows app is built from the ground-up in C# and makes it easier than ever before to create your very own bespoke Groestlcoin address(es), even whilst not connected to the internet! You can even generate multiple keys with the same prefix and leave it on overnight whilst your CPU or GPU collects and stores these addresses locally.
If you're tired of the random, cryptic addresses generated by regular groestlcoin clients, then Groestlcoin EasyVanity is the right choice for you to create a more personalized address.

Features

• Ability to continue finding keys after first one is found • Includes warning on startup if connected to the internet • Ability to output keys to a text file (And shows button to open that directory) • Ability to make your match case sensitive (Where possible) • Show and hide the private key with a simple toggle switch, and copy the private key straight to your clipboard • Show full output of commands • Includes statistics whilst the application is running • Ability to choose between Processor (CPU) and Graphics Card (GPU) • Automatically detects 32 or 64 bit systems • Features both a Light and Dark Material Design inspired Themes • EasyVanity's search is probabilistic, and the amount of time required to find a given pattern depends on how complex the pattern is, the speed of your computer, and whether you get lucky. • EasyVanity includes components to perform address searching on your CPU (vanitygen) and your OpenCL-compatible GPU (oclvanitygen). Both can be built from source, and both are included in the Windows binary package. • Prefixes are exact strings that must appear at the beginning of the address. When searching for prefixes, Easyvanity will ensure that the prefix is possible, and will provide a difficulty estimate. • The percentage displayed just shows how probable it is that a match would be found in the session so far. If it finds your address with 5% on the display, you are extremely lucky. If it finds your address with 92% on the display, you are unlucky. If you stop EasyVanity with 90% on the display, restart it, and it finds your address with 2% on the display, your first session was unlucky, but your second session was lucky. • EasyVanity uses the OpenSSL random number generator. This is the same RNG used by groestlcoin and a good number of HTTPS servers. It is regarded as well-scrutinized. Guessing the private key of an address found by EasyVanity will be no easier than guessing a private key created by groestlcoin itself. • To speed up address generation, EasyVanity uses the RNG to choose a private key, and literally increments the private key in a loop searching for a match. As long as the starting point is not disclosed, if a match is found, the private key will not be any easier to guess than if every private key tested were taken from the RNG. EasyVanity will also reload the private key from the RNG after 10,000,000 unsuccessful searches (100M for oclvanitygen), or when a match is found and multiple patterns are being searched for. • Free software - MIT. Anyone can audit the code. • Written in C# - The code is short, and easy to review.

Groestlcoin Sentinel (Android & Blackberry) – Mainnet + Testnet

What is Sentinel?

Groestlcoin Sentinel is the easiest and fastest way to track/receive/watch payments in your offline Groestlcoin Wallets. Groestlcoin Sentinel is compatible with any standard Groestlcoin address, BIP44 XPUB (Extended Public Key) BIP49 YPUB and BIP84 ZPUB
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 particular wallet.

What's New?

The P2SH paperwallet supports creating P2SH paperwallets in bulk, keypair generation with QR codes and sweeping tool. Groestlcoin believes strongly in privacy, the live version does not collect and store IP or transaction data.
Changes
Features
The BECH32 paperwallet supports creating BECH32 paperwallets in bulk, keypair generation with QR codes and sweeping tool. Groestlcoin believes strongly in privacy, the live version does not collect and store IP or transaction data.
Features
![WebWallet](https://i.imgur.com/Z2oj7bj.png)

Groestlcoin Web Wallet Update 1.4

What is Groestlcoin Web Wallet?
Groestlcoin Webwallet is an open source, multisignature, HD Wallet and more! Webwallet is a a open source browser based Groestlcoin webwallet.
Webwallet is a playground for Groestlcoin in javascript to experiment with. It supports multisig, OP_HODL, RBF and many more. Groestlcoin believes strongly in privacy, the live version does not collect and store IP or transaction data.
Changes:
submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

Forkdrop.io Week 6 - A Novice's Guide to Claiming Forks

forkdrop.io and follow us on Twitter https://twitter.com/forkdrop
We are at 65 Bitcoin Forks/Airdrops 13 Altcoin, 12 Historic and 59 exchanges tracked.
This week, we launched our Guides section which features includes a multi-part in-depth guide for using the bitcoin_fork_claimer tool securely and privately on an Ubuntu live-boot system. They include many screenshots to help step through the process at a comfortable pace.
https://forkdrop.io/novices-guide-to-claiming-forked-bitcoin-value.html
Among other things, we take you through setting up a live-boot Linux environment:
https://forkdrop.io/secure-live-boot-ubuntu-for-bitcoin-keys.html
Installing and running the Tor Browser in said environment:
https://forkdrop.io/running-tor-browser-from-ubuntu-live-boot.html
Downloading Ian Coleman's BIP39 tool for running offline and using it:
https://forkdrop.io/running-bip-39-tool-on-secure-offline-ubuntu-system.html https://forkdrop.io/using-ian-colemans-bip-39-tool.html
Covering the basics of u/ymgve's tool for preparing to run it:
https://forkdrop.io/preparing-to-use-bitcoin-fork-claimer-tool.html https://forkdrop.io/finding-parameters-for-bitcoin-fork-claimer-tool.html
Tips on finding exchanges to deposit while keeping your identity as private as you want to be:
https://forkdrop.io/scouting-exchanges-to-sell-forked-bitcoin-value.html
And then actually running the scripts:
https://forkdrop.io/running-bitcoin-fork-claimer-on-ubuntu.html
20 articles in total which will grow in size as we go forward.
There were also some minor feature improvements this week, such as adding the marker icon to the per-coin and per-exchange pages.
Summary of dataset updates:
Stuff we are working on:
  1. More guides/articles & improved presentation of existing articles
  2. Night mode (much requested!)
  3. Better price info
  4. Tell us what you want to see!
Ways to support the site:
  1. Participate in BitcoinAirdrops - we read it all
  2. Submit us your info, corrections, etc.
  3. Follow us on Twitter: https://twitter.com/forkdrop
  4. Participate in the Disqus discussion forms for each coin/exchange
  5. Use the referral links when signing up for exchanges <3 <3 <3
  6. Send donations to donation addresses on the footer of the site
All the Best,
The Forkdrop.io Team
submitted by forkdrop to BitcoinAirdrops [link] [comments]

How to claim BTG from Breadwallet without Coinomi (iPhone users)

I recently asked if anyone here had trouble retrieving BTG, if they held their BTC on Breadwallet at the time of the fork. After the fork I moved my BTC to a Ledger, but when I use the Ledger BTG split tool it shows my balance as 0.
This has been driving me crazy but I finally figured it out.
So it turns out the BTG was still sitting at my Breadwallet address, even though my Breadwallet shows a BTC balance of 0 and doesn’t offer BTG support.
Here’s how to get your BTG:
1 Download the iPhone apps Bit Pie and Bither. They seem a little sketch but this process worked for me and my BTG is now safely on Binance.
2 Follow steps 1-3 here
https://medium.com/@SimonEast/how-to-sweep-bitcoin-gold-btg-from-a-paper-wallet-using-ios-86010fa208de
3 You’ll need to convert your Breadwallet recovery phrase into a private key to complete step 4 at the link above. To do that I used this tool:
https://iancoleman.io/bip39/
Download that site and run it locally with your wifi turned off before you enter your private keys. Here is a link that explains the process:
https://bitcointalk.org/index.php?topic=2062242.0
4 To import the private key in Bither you need to tap options > advanced options > import private key > from private key text > click the camera icon to take a photo of the QR codes generated by the recovery phrase tool.
5 Follow the remaining steps 7-8 at the Medium link
6 Transfer from Bit Pie to Binance or an exchange of your choice
Good luck!
submitted by EricFromOuterSpace to BitcoinGoldHQ [link] [comments]

12-27 02:12 - 'How to claim BTG from Breadwallet without Coinomi (iPhone users)' (self.Bitcoin) by /u/EricFromOuterSpace removed from /r/Bitcoin within 0-3min

'''
I recently asked if anyone here had trouble retrieving BTG, if they held their BTC on Breadwallet at the time of the fork. After the fork I moved my BTC to a Ledger, but when I use the Ledger BTG split tool it shows my balance as 0.
This has been driving me crazy but I finally figured it out.
So it turns out the BTG was still sitting at my Breadwallet address, even though my Breadwallet shows a BTC balance of 0 and doesn’t offer BTG support.
Here’s how to get your BTG:
1 Download the iPhone apps Bit Pie and Bither. They seem a little sketch but this process worked for me and my BTG is now safely on Binance.
2 Follow steps 1-3 here
[link]1
3 You’ll need to convert your Breadwallet recovery phrase into a private key to complete step 4 at the link above. To do that I used this tool:
[link]2
Download that site and run it locally with your wifi turned off before you enter your private keys. Here is a link that explains the process:
[link]3
4 To import the private key in Bither you need to tap options > advanced options > import private key > from private key text > click the camera icon to take a photo of the QR codes generated by the recovery phrase tool.
5 Follow the remaining steps 7-8 at the Medium link
6 Transfer from Bit Pie to Binance or an exchange of your choice
Good luck!
'''
How to claim BTG from Breadwallet without Coinomi (iPhone users)
Go1dfish undelete link
unreddit undelete link
Author: EricFromOuterSpace
1: https://medium.com/@SimonEast/how-to-sweep-bitcoin-gold-btg-from-a-paper-wallet-using-ios-86010fa208de 2: i*ncoleman.***bip39* 3: https://bitcointalk.org/index.php?topic=2062242.0
Unknown links are censored to prevent spreading illicit content.
submitted by removalbot to removalbot [link] [comments]

[uncensored-r/Bitcoin] How to claim BTG from Breadwallet without Coinomi (iPhone users)

The following post by EricFromOuterSpace is being replicated because the post has been silently removed.
The original post can be found(in censored form) at this link:
np.reddit.com/ Bitcoin/comments/7mc31z
The original post's content was as follows:
I recently asked if anyone here had trouble retrieving BTG, if they held their BTC on Breadwallet at the time of the fork. After the fork I moved my BTC to a Ledger, but when I use the Ledger BTG split tool it shows my balance as 0.
This has been driving me crazy but I finally figured it out.
So it turns out the BTG was still sitting at my Breadwallet address, even though my Breadwallet shows a BTC balance of 0 and doesn’t offer BTG support.
Here’s how to get your BTG:
1 Download the iPhone apps Bit Pie and Bither. They seem a little sketch but this process worked for me and my BTG is now safely on Binance.
2 Follow steps 1-3 here
https://medium.com/@SimonEast/how-to-sweep-bitcoin-gold-btg-from-a-paper-wallet-using-ios-86010fa208de
3 You’ll need to convert your Breadwallet recovery phrase into a private key to complete step 4 at the link above. To do that I used this tool:
https://iancoleman.io/bip39/
Download that site and run it locally with your wifi turned off before you enter your private keys. Here is a link that explains the process:
https://bitcointalk.org/index.php?topic=2062242.0
4 To import the private key in Bither you need to tap options > advanced options > import private key > from private key text > click the camera icon to take a photo of the QR codes generated by the recovery phrase tool.
5 Follow the remaining steps 7-8 at the Medium link
6 Transfer from Bit Pie to Binance or an exchange of your choice
Good luck!
submitted by censorship_notifier to noncensored_bitcoin [link] [comments]

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It is very important to understand how your private keys are stored just in case there is an issue with your wallet client or device that holds your funds. Not all mnemonic phrases are the same. BIP32, BIP39 & BIP44. The recovery procedure, however, is not too obvious, as it is necessary to make some distinctions based on the standard of seed adopted. There are several, including BIP32, BIP39, BIP44 and also BIP43. Typically, most cryptocurrency wallets use the first three. Since the Bitcoin Cash (BCH) hard fork on Nov. 15 resulted in a blockchain split, many pre-fork holders are interested in finding out how to split their Today we’re going to discuss how anyone ... So when exploring different metal wallets I found some that allowed you to tap in the number corresponding to your bip39 word in your seed. So I wondered, why do we use words at all? Why not just take the seed that an HD wallet generates and record that? Why do we have to convert the seed into words and store the word if... Introduced in Bitcoin with BIP39, ... these can be loaded into any BIP32-compatible wallet to recover your funds. There are 2048 words on the BIP39 wordlist, meaning that a string of 12 words would have 128 bits of security. This means that an attacker would need to perform 2128 operations to guess a 12-word seed. It may look like a small number, but it certainly isn’t. It’s practically ... If you are new to Bitcoin then you may wonder how to locate a transaction ID of your Bitcoin transaction. Finding the transaction hash ID is very simple and here we’ll show you how to locate this on various services such as: Core wallet, Electrum Wallet, Blockchain wallet, Coinbase, Exchange and Block Explorer. Core and Electrum wallet: If you have a hot or hardware wallet for cryptocurrency, during its creation you were asked to write down a BIP39 mnemonic phrase, which can consist of 12, 18 or 24 words. As a rule, the phrase is written in a diary, notebook, notebook, or in special waterproof cards that come with hardware wallets. The […] Will be moving to a titanium backup, before I do, should I test run my seed? If so, how would I go about this? I was meticulous in recording it but you never know.... submitted by /u/Twentyfourtyeight [link] [comments] Bitcoin estuvo correlacionado con el S&P 500. El nuevo informe de la cripto exchange más grande del mundo ha revelado una correlación de Bitcoin (BTC), con muchos activos del mundo tradicional durante los tres primeros meses. La investigación ha sido encabezada por Binance Research, la filial de la cripto exchange encargada del monitoreo del mercado. Bitcoin Stack Exchange is a question and answer site for Bitcoin crypto-currency enthusiasts. It only takes a minute to sign up. Sign up to join this community. Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Bitcoin . Home ; Questions ; Tags ; Users ; Unanswered ; generate wallets in exchanges like binance? Ask Question Asked 2 months ago ...

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