This book constitutes the refereed conference proceedings of the 18th Australasian Conference on Information Security and Privacy, ACISP 2013, held in Brisbane, Australia, in July 2013. The 28 revised full papers presented were carefully selected from 78 submissions. Conference papers are organized in technical sessions, covering topics of Cryptanalysis, RSA, Lattices and Security Proofs, Public Key Cryptography, Hashing, Signatures, Passwords, Mobile Security, and Secret Sharing.

This book constitutes the refereed proceedings of the 28th Australasian Conference on Information Security and Privacy, ACISP 2023, held in Brisbane, QLD, Australia, during July 5-7, 2023. The 27 full papers presented were carefully revised and selected from 87 submissions. The papers present and discuss different aspects of symmetric-key cryptography, public-key cryptography, post-quantum cryptography, cryptographic protocols, and system security.