Cryptology and Network Security

This book constitutes the proceedings from the 24th International Conference on Cryptology and Network Security, CANS 2025, held in Osaka, Japan during November 17–20, 2025.The 26 full papers and 7 short papers were carefully reviewed and selected from 81 submissions. They are organized in topical sections as follows: Post-Quantum Cryptography; Symmetric-Key Cryptography; Multi-Party Computation; Advanced Encryption; Cryptographic Protocols and Blockchain; Vulnerability Detection; and Attacks.