Symmetric-key cryptography, Hash functions, Authenticated Encryption Modes -- Multimixer-156: Universal Keyed Hashing Based on Integer Multiplication and cyclic shift -- On the Security of Triplex- and Multiplex-type Constructions with Smaller Tweak Size -- From Substitution Box To Threshold -- Tight Security Bound of 2k-LightMAC Plus -- Designing Full-Rate Sponge based AEAD Modes -- Towards Minimizing Tweakable Blockcipher-based Generalized Feistel Net- works -- The Patching Landscape of Elisabeth-4 and the Mixed Filter Permutator Paradigm -- Elliptic curves, Zero-knowledge proof, Signatures -- Generating Supersingular Elliptic Curves over Fp with Unknown Endmorphism Ring -- Kummer and Hessian meet in the Field of Characteristic 2 -- Synchronized Aggregate Signature under Standard Assumption in the Random Oracle Model -- Malleable Commitments from Group Actions and Zero-Knowledge Proofs for Circuits based on Isogenies -- Attacks -- A CP-based Automatic Tool for Instantiating Truncated Differential Characteristics -- Falling into Bytes and Pieces – Cryptanalysis of an Apple Patent Application -- Grover on chosen IV related key attack against GRAIN-128a -- Concrete Time/Memory Trade-Offs in Generalised Stern’s ISD Algorithm -- Practical Aspects of Vertical Side-Channel Analyses on HMAC-SHA-2.

The two-volume proceedings constitutes the refereed proceedings of the 24th International Conference on Progress in Cryptology, INDOCRYPT 2023, Goa, India, in December 2023. The 26 full papers were carefully reviewed and selected from 74 submissions. They are organized in topical sections as follows: Part I: Symmetric-key cryptography, Hash functions, Authenticated Encryption Modes; Elliptic curves, Zero-knowledge proof, Signatures; Attacks. Part II: Secure computation, Algorithm hardness, Privacy; Post-quantum cryptography.