This book constitutes the proceedings of the 15th International Conference on Security and Cryptography for Networks, SCN 2026, which took place in Amalfi, Italy, during September 14-16, 2026.

The 33 full papers included in the proceedings were carefully reviewed and selected from 91 submissions. They were organized in topical sections such as Building blocks, Signature schemes, Encryption schemes, Secure computation, Key management, Proof systems, and Distributed ledger technologies