[3357] in cryptography@c2.net mail archive
Fwd: Re: r.e. quality of IDEA...
daemon@ATHENA.MIT.EDU (Rodney Thayer)
Wed Sep 23 19:25:44 1998
Date: Wed, 23 Sep 1998 19:06:28 -0400
To: cryptography@c2.net
From: Rodney Thayer <rodney@tillerman.nu>
Thanks for the input. Key schedule set-up time is a canard in
the IPSec world, as there are amazing amounts of heavy lifting
going on around key set-up time anyway. (1500 bit
Diffie-Hellman, etc.)
>To: Rodney Thayer <rodney@tillerman.nu>, cryptography@c2.net
>From: David Honig <honig@sprynet.com>
>Subject: Re: r.e. quality of IDEA...
>
>IDEA uses algebraic operations to generate its F() function,
>in the Feistel sense.
>
>Blowfish uses a large 'random' table to start and iterates
>itself 521 times, using the user-key, to replace all those
>32-bit values.
>
>You tell me which is going to be more analytically exploitable.
>
>----------
>
>Blowfish has a very long key initialization time.
>IDEA does not. The pros and cons of hitchhiking.
>
>The NSA asked the NIST to request that AES ciphers
>be able to encrypt 2 blocks with 2 keys in the same
>time as 2 blocks with 1 key. Ie, ciphers you can search
>rapidly are mucho desirable from the perspective
>of the eye in the sky.
