This book constitutes the refereed proceedings of the International Conference on the Theory and Applications of Cryptology and Information Security, ASIACRYPT'98, held in Beijing, China, in October 1998. The 32 revised full papers presented were carefully reviewed and selected from a total of 118 submissions. The book is divided in topical sections on public-key cryptosystems, elliptic-curve cryptosystems, cryptanalysis, digital signature schemes, finite automata, authentication codes, electronic cash, stream ciphers, cryptographic protocols, key escrow, new cryptography, and information theory.