Mitsuru Matsui

Mitsuru Matsui, born on 16 September 1961, is a Japanese cryptographer and a senior researcher at Mitsubishi Electric. While researching error-correcting codes in 1990 he was inspired by the differential cryptanalysis of Eli Biham and Adi Shamir and discovered the technique of linear cryptanalysis, which he published in 1993; differential and linear cryptanalysis are the two major general techniques for attacking block ciphers. The following year he was the first to publicly report an experimental cryptanalysis of DES, using twelve workstations over fifty days. He is the author of the MISTY1 and MISTY2 block ciphers, and RFC 2994 of November 2000, which describes MISTY1, lists him with H. Ohta at Mitsubishi Electric. He also contributed to the design of Camellia and KASUMI, and he received the 2012 RSA Conference Award for Excellence in Mathematics.