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Bitcoin Wallet

Everything about bitcoin wallets.
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Recovered my 4 year old wallet

I am super stoked about this. A long time ago (2011-2015), on an old machine (an iMac), I used Armory. I was selling that old machine, so I swept my keys into an electrum wallet, and I replaced the hard drive that was in it knowing one day I would come back to it.
Well, a couple years after that, I had issues because I couldn't access the files from that hard drive without another mac (trust me, I tried. I password protected that hard drive so only booting it from a legit mac would grant me access to it). And, I lost my paper backup... Luckily, my friend had an old mac mini he let me borrow, and I sat on it for about another 2 years.
Today, I finally pulled my wallet off, and could not remember the password I put on the wallet. Thank god for the btcrecover tool, because that cracked my password in under a second (I remembered what it could of been, but not exactly. I would have not guessed what it actually was).
It's not a huge amount of bitcoin. But it was more than I remembered keeping (more than 1). Still face-palming though at some of my transactions. I had my armory wallet going back to 2012. Sooooo many bitcoins went through that wallet, mining on slush with my petty mac GPU. I had one of the first OG ASIC butterfly 60GH/s miners too. If only I had kept more, I could quit my day job now. Oh well.
But, I thought I'd share an antitheses to the old "I lost my old wallet. please help!!!" posts. Probably going to continue sitting on it for a few more years. And now that I've regained interest, I'm going to start running a full node again. To the moon!
submitted by timeddilation to Bitcoin [link] [comments]

Be your own bank: Store your bitcoin without getting robbed.

There are countless examples of bitcoin theft, and every time I hear another story about coins being stolen it hurts.
It hurts because I hate to see someone get ripped off, and it hurts because it erodes public confidence in Bitcoin.
There are three methods by which your bitcoin can be stolen:
  1. Human error - Sorry, it’s your fault. Even if it is someone else’s error, you trusted them
  2. Coercion - You were persuaded by use of force or threats
  3. Stolen backup - keep them safe!
The guidelines below will help you avoid bitcoin theft.
This is not meant to be a definitive guide, it is a solid foundation, and there are many things you could do to enhance this security further.
The basics:
Protect your privacy
Do not reuse addresses. If you have a public address, like a donation address, empty it often.
Do not talk about holding large amounts of bitcoin (just common sense…)
Trust no one
Bitcoin is trust-less, use it that way
No web wallets, No web wallets, No web wallets.
Do not store bitcoin on exchanges, always use 2FA (Two factor authentication), I use Google Authenticator
Create and store your own private keys
Remove any remote desktop software (team viewer, gotomypc, etc..) from a computer with private keys
Use unique strong passwords
Use a secure password manager for your logins (I use pwSafe)
Do not store private keys or wallet passwords in a password manager
My cold storage wallet passwords are written on a piece of paper and kept locked up
Do not use the same password on multiple sites or wallets
Include upper and lower case letters, numbers and special characters
Strong password example: /ZjucKn=0Eb;%@u[Zp
Use good antivirus protection (I use Bitdefender on mac)
Keep it up to date
Consider physical security
If you store your 2nd wallet backup in the glove compartment of your car, and your car gets stolen, your bitcoins may be gone too…
Mobile devices: Do not use the same pin to unlock your phone and wallet
Protect your backups
Keep backups
Whenever I create a new wallet I create 2 full paper backups including the seed and any other security (password, pin, etc…).
I write these on paper by hand
I only use HD and paper wallets, all the tools below are HD.
My backups are physically secure and stored in geographically distinct locations
My wife (yes, I trust her ;)) knows where they are and how to use them in case I’m incapacited
The tools I use:
  1. Paper - https://www.bitaddress.org I use bitaddress.org on an old laptop that is permanently offline, and print on a trusted, non-networked printer. Source: https://github.com/pointbiz/bitaddress.org
  2. Armory (offline) - https://bitcoinarmory.com/ That same old laptop contains an offline version of Armory for my cold storage, tutorial: https://bitcoinarmory.com/tutorials/armory-advanced-features/offline-wallets/
  3. Armory (online) - Used for signing transactions and small amounts of coin, when online I don’t type my password, I use the mouse and jumbled screen keypad
  4. Trezor - https://buytrezor.com?a=859328776dca (that is my affiliate link) Great hardware wallet, very secure and very hard to “screw up”, $119
  5. Breadwallet - http://app.breadwallet.com/ Open source iOS app, I keep a little change here for every day spending
Other tools I like:
Electrum (Android version) https://electrum.org/
mSIGNA (in beta, lots of potential) https://ciphrex.com/products/
Please feel free to correct me or supplement this in any way that increases security.
Stay safe.
submitted by CoinCadence to Bitcoin [link] [comments]

I created a minimalistic application for managing scrypt hashed offline brainwallets

I was bored of seeing people getting either their bitcoin stolen or lost because of computer bug or hacking... So I created this minimalistic application
It needs expert users to test it review it and confirm it works as expected
http://github.com/xorq/EasyBTC
so people can manage their offline brainwallets easily. I added a scrypt key stretching function for the brainwallet so bruteforcing becomes extremely difficult. My goal is to help people to protect themselves against loss and theft. I compiled the program for windows, mac and linux... I would recommend to open it with Tails (tails.boum.org).
*No more problem with the change: it goes back to the sending address. Also the app always creates the transaction so only the smallest amount of transactions are redeemed.
*No more wallet file lost (just remember your seed, please use a unique and unbruteforcable one, if you not sure how to create a seed, please remember it should be long and impossible for anyone to guess and as random as possible)
*No more bruteforce attack: when you use scrypt, it should protect your seed against bruteforce attacks. Use it as an additional security.
*No more hacking: This is a cold storage... if you follow the steps, your seed / private key will never be stored anywhere in the first place, and most importantly will never appear on an online system.
The application is minimalistic : you do not need to download the whole blockchain and spend days waiting that your computer update everything like for Armory.
It's open source, if you review the code, please let people know.
I hope this will help people to avoid losing their coins, or feeling like they do not have the knowledge to create their offline address by themselves, and thus understand that there is no need to give trust to anyone to store them.
Dan (xorq)
submitted by xorq to Bitcoin [link] [comments]

Sure Bitcoin is safe Grandma. This is all you have to do to really secure your money

THIS IS FUCKED. BITCOIN HAS NO FUTURE IF WE CAN'T FIND A BETTER WAY TO MAKE IT SECURE. MAIN STREET WILL RUN A MILE FROM IT.
Xpost from: http://www.reddit.com/Bitcoin/comments/1d26gw/cold_storage_how_i_did_it/
With the recent events surrounding blockchain.info wallet attacks, I decided to bite the bullet and send all my coins to my cold wallet. It's a bit nerve wrecking but I managed. Here's what I did:
Download offline version of Armory here[1] (section Linux – Offline Bundle for Ubuntu 10.04)
Download Brainwallet source from github[2] for signing transactions, rather than the suggested way from armory website, since I don't want to run a full Bitcoin-qt client + armory to create an unsigned tx. More on this later
Prepare a USB pendrive for linux here[3] using the suggested Ubuntu 10.04 by Armory.
Boot into Linux using that pendrive. Install the Armory software and generate a new wallet. Make sure you make appropriate backup (paper copy or just write down the seed). You can always regenerate your entire wallet via brainwallet.org copy (tab Chains).
If you want, make a watch only copy of your wallet, and you can get all the public address in that wallet from your online computer via Armory offline version. Save the watch only wallet on your windows partition.
Reboot into windows/mac/your main OS.
Install armory and import the watch only wallet to see all of your addresses.
Try to move a small fund into one of the cold-storage addresses. Wait for it to have 6 confirmations. Then we can try to spend that fund by doing the following:
Get unspent output from your cold-storage address: https://blockchain.info/unspent?address=[4] Copy the output into a text file, leave it on your windows machine. Linux copy will be able to read this file.
Boot back into linux on your pendrive. Use saved brainwallet.org website to sign that transaction (use tab Transaction) by pasting the private key of the address (get from Armory, without space) and the unspent output. Sign the message. Then save the output to the same txt file.
Boot back into your main OS. Paste that signed output to http://blockchain.info/pushtx[5] and push it. You're good to go. You spent your fund in your cold storage.
Now, move everything you have from your online storage there.
submitted by BitCoinWarrior to Bitcoin [link] [comments]

Github for Mac installs a webserver, Github Tutorial For Beginners - Github Basics for Mac or ... Bitcoin GitHub History Visualization - Multiple Projects (Jan 2015) Compile Bitcoin's source code (0.13) UPDATED How to do GPU Bitcoin Mining on a Mac Easily

Github's Armory project has a link [2] to Mac OS X build notes which are the ones i followed and i explained it all very well on the very first message of this post. My conclusion is your working and coding style, plus the way you deal with issues or bugs is a complete mess. You should pay more attention to others and less to yourself. You were not able to carefully read the messages a kept on ... GitHub Gist: instantly share code, notes, and snippets. Skip to content. All gists Back to GitHub. Sign in Sign up Instantly share code, notes, and snippets. WyseNynja / building armory-qt. Last active Oct 31, 2016. Star 17 Fork 5 Code Revisions 16 Stars 15 Forks 5. Embed. What would you like to do? Embed Embed this gist in your website. Share Copy sharable link for this gist. Clone via HTTPS ... See the next section for more info. If you don't have a verified copy of Armory yet, you should follow these instructions to verify the first Armory installer you download via GPG. Armory is used by some of the most heavily-invested, and most paranoid Bitcoin enthusiasts and cloud miners for maximum privacy and security. If you are in this ... Bitcoin Armory ist eine Open-Source-, Python-basierte, Wallet-Management-Anwendung für das Bitcoin-Netzwerk.. Armory ist eine Desktop-Anwendung für das Bitcoin-Fondsmanagement. Es ist eine voll ausgestattete Bitcoin-Wallet-Management-Anwendung, die darauf abzielt, die beiden Eigenschaften von Brieftaschen zu kombinieren, die bisher als sich gegenseitig ausschließend empfunden wurden ... ##Armory. Created by Alan Reiner on 13 July, 2011. Armory is a full-featured Bitcoin client, offering a dozen innovative features not found in any other client software! Manage multiple wallets (deterministic and watching-only), print paper backups that work forever, import or sweep private keys, and keep your savings in a computer that never touches the internet, while still being able to ...

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Github for Mac installs a webserver, "github conduit." Is ...

UPDATED How to do GPU Bitcoin Mining on a Mac Easily ... mine bitcoins using the GPU on your Apple laptop or desktop using guiminer. Guiminer for Mac can be downloaded here: https://github.com ... Github for Mac installs a webserver, "github conduit." Is that a security risk? Helpful? Please support me on Patreon: https://www.patreon.com/roelvandepaar ... Link(1): https://www.triplemining.com Link(2): https://github.com/downloads/pletoss/poclbm/guiminer-poclbm-macosx.dmg Link(3): https://coinbase.com Obrigado ... This short video shows how to compile the bitcoin source code on linux (ubunu). an easy task to do but it take some time (around 15 min) please read the instruction in the official github https ... Github Tutorial For Beginners Github Basics for Mac & Windows Free website host create account free -----...

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