This book constitutes the refereed proceedings of the 23rd Australasian Conference on Information Security and Privacy, ACISP 2018, held in Wollongong, Australia, in July 2018. The 41 revised full papers and 10 short papers presented were carefully revised and selected from 136 submissions. The papers present theories, techniques, implementations, applications and practical experiences on a variety of topics such as foundations, symmetric-key cryptography, public-key cryptography, cloud security, post-quantum cryptography, security protocol, system and network security, and blockchain and cryptocurrency.

This book constitutes the refereed proceedings of the 27th Australasian Conference on Information Security and Privacy, ACISP 2022, held in Wollongong, NSW, Australia, in November 2022.The 25 full papers presented were carefully revised and selected from 62 submissions. The papers present and discuss all aspects of information security and privacy as well as machine learning for privacy and much more.