This volume constitutes the selected papers of the 16th Annual International Workshop on Selected Areas in Cryptography, SAC 2009, held in Calgary, Alberta, Canada, in August 13-14 2009.
From a total of 99 technical papers, 27 papers were accepted for presentation at the workshop. They cover the following topics: hash functions, on block and stream ciphers, public key schemes, implementation, and privacy-enhancing cryptographic systems.