This book constitutes the thoroughly refereed post-proceedings of the Second International Conference on Information Security and Cryptology, ICISC'99, held in Seoul, Korea, in December 1999. The 20 revised full papers presented together with an invited paper were carefully reviewed and selected from a total of 61 submissions. The book is divided into topical sections on cryptoanalysis and cryptographic design; cryptographic theory and computation complexity; cryptographic protocols and authentication design; digital signatures and secret sharing; and electronic cash, applications, and implementation.