This two-volume set LNCS17133 -17134 constitutes the proceedings from the 25th International Conference on Cryptology and Network Security, CANS 2026, held in Wollongong, NSW, Australia, during November 23–25, 2026.

The 41 full papers included in these volumes were carefully reviewed and selected from 141 submissions. They are organized into the following topical sections:

Part I: Post-Quantum Cryptanalysis; Digital Signatures; Symmetric Cryptanalysis; Secure Computation; and Security Analysis.

Part II: Lattices & Codes; Cryptographic Protocols; Applied Cryptography; Network Security; and Learning & Security.