Symmetric Key Cryptography -- The Offline Quantum Attack Against Modular Addition Variant of Even-Mansour Cipher -- Known Key Attack on GIFT 64 and GIFT 64 Based on Correlation Matrices -- On the Security Bounds for Block Ciphers without Whitening Key Addition against Integral Distinguishers -- On the Security Bounds for Block Ciphers without Whitening Key Addition against Integral Distinguishers -- Tight Multi user Security of Ascon and Its Large Key Extension -- Differential Distinguishing Attacks on SNOWV, SNOWVi and KCipher2 -- Efficient Search for Optimal Permutations of Refined TypeII Generalized Feistel Structures -- Homomorphic Encryption -- FFHEW High Precision Approximate Homomorphic Encryption with Batch Bootstrapping -- NTRU based FHE for Larger Key and Message Space -- An Efficient Integer-wise ReLU on TFHE -- HERatio Homomorphic Encryption of Rationals using Laurent polynomials -- TFHE Bootstrapping Faster Smaller and Time Space TradeOffs -- Approximate Methods for the Computation of Step Functions in Homomorphic Encryption -- Encryption and its Applications -- Key Cooperative Attribute-Based Encryption -- On the Feasibility of Identity based Encryption with Equality Test against Insider Attacks -- Non interactive Publicly Verifiable Searchable Encryption with Forward and Backward Privacy -- On the Implication from Updatable Encryption to Public Key Cryptographic Primitives -- Continuous Version of Non malleable Codes from Authenticated Encryption -- Digital Signatures -- Pairing Free ID Based Signatures as Secure as Discrete Logarithm in AGM -- Threshold Ring Signatures with Accountability -- Threshold Signatures with Private Accountability via Secretly Designated Witnesses -- Cryptographic Primitives -- A Novel Window τ NAF on Koblitz Curves -- Parallel Algorithms on Hyperelliptic Pairings using Hyperelliptic Nets -- AlgSAT a SAT Method for Verification of Differential Trails from an Algebraic Perspective -- Hadamard product argument from Lagrange-based univariate polynomials.

This volume constitutes the refereed proceedings of the 29th Australasian Conference, ACISP 2024, held in Sydney, NSW, Australia, during July 15-17, 2024. The 70 full papers were carefully reviewed and selected from 232 submission. They are categorized in the following sections: Symmetric Key Cryptography, Homomorphic Encryption, Encryption and its Applications, Digital Signatures.