This Fast Software Encryption workshop was the ninth in a series of workshops started in Cambridge in December 1993. The previous workshop took place in YokohamainApril2001.Itconcentratedonallaspectsoffastprimitivesfor symmetric cryptography: secret key ciphers, the design and cryptanalysis of block and stream ciphers, as well as hash functions and message authentication codes (MACs). The ninth Fast Software Encryption workshop was held in February 2002 in Leuven, Belgium and was organized by General Chair Matt Landrock (Cryp- mathic Belgium), in cooperation with the research group COSIC of...