[19612] in cryptography@c2.net mail archive
Re: long-term GPG signing key
daemon@ATHENA.MIT.EDU (Alexander Klimov)
Fri Jan 13 09:35:14 2006
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Thu, 12 Jan 2006 13:14:53 +0200 (IST)
From: Alexander Klimov <alserkli@inbox.ru>
To: Ian G <iang@systemics.com>
Cc: cryptography@metzdowd.com
In-Reply-To: <43C51D72.7020003@systemics.com>
On Wed, 11 Jan 2006, Ian G wrote:
> Even though triple-DES is still considered to have avoided that
> trap, its relatively small block size means you can now put the
> entire decrypt table on a dvd (or somesuch, I forget the maths).
This would need 8 x 2^{64} bytes of storage which is approximately
2,000,000,000 DVD's (~ 4 x 2^{32} bytes on each).
Probably, you are referring to the fact that during encryption of a
whole DVD, say, in CBC mode two blocks are likely to be the same
since there are an order of 2^{32} x 2^{32} pairs.
--
Regards,
ASK
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