Symmetric-Key Cryptography -- Improved Differential Cryptanalysis on SPECK Using Plaintext Structures -- Linear Cryptanalysis and Its Variants with Fast Fourier Transformation Technique on MPC/FHE/ZK-Friendly Fp-based Ciphers -- A New Correlation Cube Attack Based on Division Property -- The Triangle Differential Cryptanalysis -- Key Recovery Attacks on Grain-like Keystream Generators with Key Injection -- Related-Cipher Attacks: Applications to Ballet and ANT -- Cryptanalysis of SPEEDY -- Reconsidering Generic Composition: the modes A10, A11 and A12 are insecure -- Exploring Formal Methods for Cryptographic Hash FunctionImplementations -- Public-Key Cryptography -- A Tightly Secure ID-Based Signature Scheme under DL Assumption in AGM -- Compact Password Authenticated Key Exchange from Group Actions -- Multi-key Homomorphic Secret Sharing from LWE without Multi-key HE -- Identity-Based Encryptionfrom Lattices Using Approximate Trapdoors -- Homomorphic Signatures for Subset and Superset Mixed Predicates and Its Applications -- Adaptively Secure Identity-Based Encryption from Middle-Product Learning with Errors -- Post-Quantum Cryptography -- Quantum-access Security of Hash-based Signature Schemes -- Tightly Secure Lattice Identity-Based Signature in the Quantum Random Oracle Model -- Ghidle: Efficient Large-State Block Ciphers for Post-Quantum Security -- Quantum Algorithm for Finding Impossible Differentials and Zero-Correlation Linear Hulls of Symmetric Ciphers -- Memory-Efficient Quantum Information Set Decoding Algorithm -- Cryptographic Protocols -- CSI-SharK: CSI-FiSh with Sharing-friendly Keys -- Practical Verifiable Random Function with RKA Security -- Statistically Consistent Broadcast Authenticated Encryption with Keyword Search Adaptive Security from Standard Assumptions -- Modular Design of KEM-Based Authenticated Key Exchange -- Reusable, Instant and Private Payment Guarantees for Cryptocurrencies -- System Security -- BinAlign: Alignment Padding based Compiler Provenance Recovery -- Encrypted Network Traffic Classiffication with Higher Order Graph Neural Network.

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.