bitcoin-paper-wallet

Generate a Bitcoin paper wallet offline, without the need for a browser.

Usage

lein run

The program will print out a private key and a public bitcoin address, and a wallet.png file that you can send to your printer (hopefully not connected to the internet). The paper wallet is unencrypted, so keep it in a safe place.

The wallet will look like this:

You may want to do this on a computer that's never been connected to the internet. For example, you could:

• Boot a live CD/USB of Ubuntu, don't connect it to a network.
• run lein uberjar on a trusted computer, copy the jar file to a pen drive and then to the Ubuntu box.
• run java -jar bitcoin-[version]-SNAPSHOT-standalone.jar on the Ubuntu box.

Password-protected wallets

If you run

lein run "correct horse battery staple"

You will get a wallet with an encrypted key. It will look like:

You will need your passphrase when you want to convert it into the Wallet Import Format. You can decrypt it by running:

lein run -m bitcoin.bip38 "correct horse battery staple" 6P......

If you do this, you should either memorize your passphase or keep it in a safe place separate from the wallet. Otherwise, you might as well generate it unencrypted.

WARNING WARNING WARNING

Be very careful when using this program. It uses the bitcoinj library for key generation so I'm not responsible for any bugs that might generate insecure wallets. Use at your own risk.

Find this useful? Send me a tip at 1EmwBbfgH7BPMoCpcFzyzgAN9Ya7jm8L1Z :)

License

Copyright © 2014 Diego Basch

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.