SAC 2004 was the eleventh in a series of annual workshops on Selected Areas in Cryptography. After an extensive review process, 25 papers were accepted for p- sentation at the workshop (two of these papers were merged).
This book constitutes the thoroughly refereed post-proceedings of the 11th International Workshop on Selected Areas in Cryptography, SAC 2004, held in Waterloo, Canada in August 2004.The 24 revised full papers presented were carefully selected during two rounds of reviewing and improvement. The papers are organized in topical sections on stream cipher analysis, side channel analysis, block cipher design, efficient implementations, secret key cryptography, cryptanalysis, and cryptographic protocols.