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.