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[Eric Blossom <eb@srlr14.sr.hp.com>]

> A bigger problem is that PEM uses DES rather than IDEA.  I just learned
> of a new attack by Mitsuru Matsui of Mitsubishi that requires 2^43
> *known* plaintexts, not chosen ones.  The note I received says that it
> ``breaks the scheme in 50 days on 12 HP9735 workstations''.  This was
> presented last week at the Japanese Conference on Cryptography and
> Information Security.

Anybody have an online copy of the paper, or a complete citation?

Eric Blossom