full-disclosure - Re: Introducing TGP...

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Message-ID: <optid.1783e88b6d.58DB1B68E62B9F448DF1A276B0886DF12DB5F181@EX2010.hammerofgod.com>
Date: Wed, 16 Jun 2010 22:23:04 +0000
From: "Thor (Hammer of God)" <Thor@...merofgod.com>
To: Brandon Enright <bmenrigh@...d.edu>
Cc: "<full-disclosure@...ts.grok.org.uk>" <full-disclosure@...ts.grok.org.uk>
Subject: Re: Introducing TGP...

> You're using a 1024 bit key here which seems a bit gutsy ;-)
> 
> Without better attacks, you basically have:
> 
> Brute force AES 256 -> O(2^256)
> Bruce force your 20 char password -> roughly O(2^(20*7)) == O(2^140) Factor
> your 1024 bit public modulus -> roughly O(2^80)
> 
> Since a 768 bit RSA key has already been factored I'd say you only have a few
> years before a moderately sized cluster could factor your public key.
> 
> Of course, as I write this I realize I'm about to sign this message with a 1024
> bit DSA key...

Actually it's 2048, which I was comfortable with.  And don't forget the 16bit salt on that password ;)

t

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