This book constitutes the thoroughly refereed post-conference
proceedings of the 23rd International Conference on Fast Software
Encryption, held in Bochum, Germany, in March 2016. The 29 revised full
papers presented were carefully reviewed and selected from 86 initial
submissions. The papers are organized in topical sections on operating
modes; stream-cipher cryptanalysis; components; side-channels and
implementations; automated tools for cryptanalysis; designs;
block-cipher cryptanalysis; foundations and theory; and
authenticated-encryption and hash function cryptanalysis.