This book constitutes the refereed proceedings of the 6th International Conference on the Theory and Application of Cryptology and Security, ASIACRYPT 2000, held in Kyoto, Japan in December 2000. were carefully reviewed and selected from a total of 140 submissions. signatures, cryptographic protocols, number-theoretic algorithms, symmetric-key schemes, fingerprinting, zero-knowledge and provable security, Boolean functions, pseudorandomness, and public-key encryption and key distribution.