This book constitutes the refereed proceedings of the 8th International IMA Conference on Cryptography and Coding held in Cirencester, UK in December 2001. The 33 revised full papers presented together with four invited papers were carefully reviewed and selected from numerous submissions. Among the topics covered are mathematical bounds, statistical decoding schemes for error-correcting codes, multifunctional and multiple access communication systems, low density parity check codes, iterative coding, authentication, key recovery attacks, stream cipher design, analysis of ECIES algorithms, and lattice bases attacks on IP based protocols.