Fast Software Encryption is an eight-year-old workshop on symmetric cryp- graphy including the
design and cryptanalysis of block and stream ciphers as well as hash functions. The ?rst Fast
Software Encryption Workshop was held in Cambridge in 1993 followed by Leuven in 1994
Cambridge in 1996 Haifa in 1997 Paris in 1998 Rome in 1999 and New York in 2000. This Fast
Software Encryption Workshop FSE 2001 was held from 2-4 April 2001 in Yokohama Japan in
cooperation with the Institute of Industrial Science of the University of Tokyo. This year a
total of 46 papers were submitted to FSE 2001. After a t- month review process 27 papers were
accepted for presentation at the workshop. In addition we were fortunate to be able to
organize a special talk by Bart Preneel on the NESSIE project a European initiative to
evaluate cryptographic algorithms. The committee of this workshop was: General Chair Hideki
Imai (The University of Tokyo) Program Committee Ross Anderson (Cambridge Univ. ) Eli Biham
(Technion) Cunsheng Ding (Singapore) Henri Gilbert (France Telecom) Dieter Gollman (Microsoft)
Thomas Johansson (Lund Univ. ) Lars Knudsen (Bergen Univ. ) James Massey (Denmark) Mitsuru
Matsui (Mitsubishi Electric Chair) Kaisa Nyberg (Nokia) Bart Preneel (Katholieke Univ. Leuven)
Bruce Schneier (Counterpane) We would like to thank all submitting authors and the committee
members for their hard work. We are also appreciative of the ?nancial support provided by
Mitsubishi Electric Corporation.