This book constitutes the refereed proceedings of the First International Conference on Cryptology in India, INDOCRYPT 2000, held in Calcutta, India in December 2000. The 25 revised full papers presented were carefully reviewed and selected from a total of 54 submissions. The book offers topical sections on stream ciphers and Boolean functions, cryptoanalysis: stream ciphers, cryptanalysis: block ciphers, electronic cash and multiparty computation, digital signatures, elliptic curves, fast arithmetic, cryptographic protocols, and block cipher and public key cryptography.