This book constitutes the thoroughly refereed post-proceedings of the 12th International Workshop on Selected Areas in Cryptography, SAC 2005, held in Kingston, Ontario, Canada, in August 2005.
The 25 revised full papers presented were carefully reviewed and selected from 96 submissions for inclusione in the book. The papers are organized in topical sections on stream ciphers, block ciphers, modes of operation, public key cryptography, key establishment protocols and access control, hash functions, protocols for RFID tags, and efficient implementations.