From: Stefan Rusterholz <apeiros@...>
Date: 2007-09-03T14:33:29+09:00
Subject: Re: 2 Way encryption for password

Gabriel Dragffy wrote:
> Hi
> 
> I'm creating a password database (a dangerous thing to do, I know!)
> normally I'd hash the passwords for storage in the DB, but in this
> case I need to be able to also reverse them to their original state.
> I'm familiar with the digest module, but of course it isn't of use
> here. I didn't see anything obvious on my Google travels. Could
> anyone suggest how to perform encryption in ruby, in particular based
> on a rails application...?
> 
> Many thanks
> 
> Gabriel

Small nitpick about terminology: encryption is per definition 2 way, 
what is often wrongly refered to as 1 way encryption is normally 
cryptographic hashing (also see the note 
http://en.wikipedia.org/wiki/One-way_encryption: "Note that encryption 
is, by definition, reversible. Hence, the term one-way encryption is 
slightly incorrect in a sense.")

Regards
Stefan
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