This book constitutes the refereed proceedings of the 15th International Conference on the
Theory and Application of Cryptology and Information Security ASIACRYPT 2009 held in Tokyo
Japan in December 2009. The 41 revised full papers presented were carefully reviewed and
selected from 298 submissions. The papers are organized in topical sections on block ciphers
quantum and post-quantum hash functions I encryption schemes multi party computation
cryptographic protocols hash funtions II models and frameworks I cryptoanalysis: square and
quadratic models and framework II hash functions III lattice-based and side channels.
