[HacktionLab] Electronic sealed envelope system?

[Sam Tuke]

On Saturday 03 Nov 2012 14:00:23 Brent wrote:
> I need to selectively share a master password with a group. They won't need
> it usually, but more than just me should know it or at least have access to
> it.
> 
> Assuming people won't manage to remember it, and won't get heads around
> encrypted files or emails. Don't want to email in plain text.

This may not be useful to you, but you can encrypt a file to multiple public 
(GPG) keys using OpenSSL seal and PHP 
(http://www.php.net/manual/en/function.openssl-seal.php).

This basically means that your file can be encrypted automatically so that only 
a set number of people can decrypt it, using their private keys.

Implementing this in PHP isn't very hard in order to provide a simple web 
interface for this procedure. I'm using this 'envelope' system as part of the 
current rewrite of ownCloud's encrypted backend (http://owncloud.org/).

Best,

Sam.
-- 
Sam Tuke
Campaign Manager
Free Software Foundation Europe
IM : samtuke at jabber.fsfe.org
Latest UK Free Software news: uk.fsfe.org
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