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Re: [gnutls-dev] 256 bit ciphers

From: Simon Josefsson
Subject: Re: [gnutls-dev] 256 bit ciphers
Date: Sat, 13 Oct 2007 21:58:20 +0200
User-agent: Gnus/5.110007 (No Gnus v0.7) Emacs/22.1 (gnu/linux)

Also, I have a vague memory of people who believe that block ciphers
with X bit keys only provide X/2 bits of security.  I can't site papers
now, but maybe you or someone else can substantiate or refute this.
I've always thought that this was the reason AES were standardized with
both 128 and 256 bit sizes.


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