This book constitutes the refereed proceedings of the 28th International Conference on Information Security and Cryptology on Information Security and Cryptology – ICISC 2025, held in Seoul, South Korea, during November 19–21, 2025.

The 28 full papers included in this book were carefully reviewed and selected from 74 submissions.They were organized in topical sections as follows:AI-Driven Threat Detection & Federated Learning; Generative & Steganographic Security Applications; Post-Quantum Cryptography & Migration; Side-Channel & Fault Analysis in PQC; Network & Application Security; Quantum Cryptanalysis & Theoretical Limits; Implementation & Hardware Acceleration; Symmetric Cryptanalysis & New Constructions; Advanced Cryptographic Protocols & Signatures.