This book constitutes the thoroughly refereed post-proceedings of the International Workshop on Coding and Cryptography, WCC 2005, held in Bergen, Norway, in March 2005.

The 33 revised full papers were carefully reviewed and selected during two rounds of reviewing and improvement from 118 submissions. The papers address all aspects of coding theory, cryptography and related areas, theoretical or applied. Topics covered are: coding theory, i.e., error-correcting codes, decoding algorithms, and related combinatorial problems; cryptology, i.e., block and stream ciphers, hash functions, public key cryptography, secret sharing, authentication, and intellectual property protection; and discrete mathematics and algorithmic tools arising from these two areas, such as boolean functions, sequences, finite fields, algebraic systems and related polynomial properties.