The two-volume set LNCS 14973 and 14974 constitutes the proceedings of the 14th International Conference on Security and Cryptography for Networks, SCN 2024, which took place in Amalfai, Italy, during September 11-13, 2024. The 33 full papers included in the proceedings were carefully reviewed and selected from 90 submissions. They were organized in topical sections as follows: Part I: Zero Knowledge; foundations; protocols; voting systems; Part II: Homomorphic encryption; symmetric key encryption; cryptanalysis; key management; blockchains.