Book excerpt: This book constitutes the refereed proceedings of the International Conference on the Theory and Application of Cryptographic Techniques, EUROCRYPT 2002, held in Amsterdam, The Netherlands, in April/May 2002. The 33 revised full papers presented were carefully reviewed and selected from a total of 122 submissions. The papers are organized in topical sections on cryptanalysis, public-key encryption, information theory and new models, implementational analysis, stream ciphers, digital signatures, key exchange, modes of operation, traitor tracing and id-based encryption, multiparty and multicast, and symmetric cryptology.