The two-volume set IFIP AICT 721 +722 constitutes the proceedings of the 18th IFIP WG 11.12 International Symposium on Human Aspects of Information Security and Assurance, HAISA 2024, held in Skövde, Sweden, in July 9–11, 2024.The 39 full papers presented were carefully reviewed and selected from 55 submissions. The papers are organized in the following topical sections:Part I - Management and Risk; Social Engineering; Technical Attacks and Defenses; Usable Security.Part II - Awareness and Education; Privacy.

The two-volume set IFIP AICT 721 +722 constitutes the proceedings of the 18th IFIP WG 11.12 International Symposium on Human Aspects of Information Security and Assurance, HAISA 2024, held in Skövde, Sweden, in July 9–11, 2024.The 39 full papers presented were carefully reviewed and selected from 55 submissions. The papers are organized in the following topical sections:Part I - Management and Risk; Social Engineering; Technical Attacks and Defenses; Usable Security.Part II - Awareness and Education; Privacy.