This book constitutes the proceedings of the 15th IFIP WG 11.12 International Symposium on Human Aspects of Information Security and Assurance, HAISA 2021, held virtually in July 2021. The 18 papers presented in this volume were carefully reviewed and selected from 30 submissions. They are organized in the following topical sections: attitudes and perspectives; cyber security education; and people and technology.

This book constitutes the proceedings of the 14th IFIP WG 11.12 International Symposium on Human Aspects of Information Security and Assurance, HAISA 2020, held in Mytilene, Lesbos, Greece, in July 2020.* The 27 full papers presented in this volume were carefully reviewed and selected from 43 submissions. They are organized in the following topical sections: privacy and COVID-19; awareness and training; social engineering; security behavior; education; end-user security; usable security; security policy; and attitudes and perceptions. *The symposium was held virtually due to the COVID-19 pandemic.

This book constitutes the proceedings of the 17th IFIP WG 11.12 International Symposium on Human Aspects of Information Security and Assurance, HAISA 2023, held in Kent, United Kingdom, in July 2023. The 37 full papers presented in this volume were carefully reviewed and selected from 54 submissions. They are organized in the following topical sections: education and training; management, policy and skills; evolving threats and attacks; social-technical factors; and research methods.

The Human Aspects of Information Security and Assurance (HAISA) symposium specifically addresses information security issues that relate to people. It concerns the methods that inform and guide users' understanding of security, and the technologies that can benefit and support them in achieving protection. This book represents the proceedings from the 2018 event, which was held in Dundee, Scotland, UK. A total of 24 reviewed papers are included, spanning a range of topics including the communication of risks to end-users, user-centred security in system development, and technology impacts upon personal privacy. All of the papers were subject to double-blind peer review, with each being reviewed by at least two members of the international programme committee.

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.