On Jan. 27, at the Japanese Conference on Cryptography and Information Security, Mitsuru Matsui of Mitsubish presented a known plaintext attack on the full 16-round DES. It requires 2^43 plaintext-ciphertext pairs, and breaks the scheme in 50 days on 12 HP9735 workstations.

I have absolutely no more information at this point. I will post again when I know something else.

I would _really_ like to see this paper. Does anyone have a preprint or copy they'd be willing to share? Mark -- Mark Henderson markh@wimsey.bc.ca (personal account) RIPEM MD5OfPublicKey: F1F5F0C3984CBEAF3889ADAFA2437433 ViaCrypt PGP Key Fingerprint: 21 F6 AF 2B 6A 8A 0B E1 A1 2A 2A 06 4A D5 92 46 cryptography archive maintainer -- anon ftp -- wimsey.bc.ca:/pub/crypto