Re: [ANN] CoinMessage: Secure Messaging with Bitcoin Addresses

Quote from: Luke-Jr on December 17, 2013, 05:36:36 AM

Quote from: altoz on December 17, 2013, 05:05:37 AM

Logins to websites without passwords, instead using a challenge/response mechanism like GPG auth.
A consistent pseudonymous internet identity that can provably be the same across websites.

This has been builtin to Bitcoin-Qt since 0.6 and used for things like the Eligius mining pool and #Bitcoin-OTC for just about as long.

Here's an example walkthrough written by BunnyH.

The link you gave is for signing public messages. Is there an option also for sending private messages?

For example, I can send you, who presumably owns this address: 134dV6U7gQ6wCFbfHUz2CMh6Dth72oGpgH a message:

AABs1tUzPFR/IEpuscV1KGZouTf0Wp11k0x9/jDkUZdLZ5DlalFrpc3h7tkXq5/E4Vbe7EHu6cjQleBx3QOMNSWGbZrTNKzlf3+TShRq

Only you should be able to read that message and only with your private key.

You're saying this exists in the Bitcoin-QT client?

edit: nevermind. I see you were talking only about the challenge/response using sign/verify. That makes sense. btw, I would appreciate it if you could decode that message as a test =)