This book constitutes the thoroughly refereed post-conference proceedings of the First Australiasian Conference on Information Security and Privacy, ACISP '96, held in Wollongong, NSW, Australia, in June 1996. The volume includes revised full versions of the 26 refereed papers accepted for presentation at the conference; also included are three invited contributions. The papers are organized in topical sections on authentication, secret sharing, encryption and cryptographic functions, authentication protocols, stream ciphers, access control, security models and intrusion detection, threshold cryptography, and hashing.