Decision and game theory for aecurity : 13th International Conference GameSec 2022 Pittsburgh PA USA October 26 28 2022 : proceedings This book constitutes the refereed proceedings of the 13th International Conference on Decision and Game Theory for Security GameSec 2022 held in October 2022 in Pittsburgh PA USA. The 15 full papers presented were carefully reviewed and selected from 39 submissions. The papers are grouped thematically on: deception in security; planning and learning in dynamic environments; security games; adversarial learning and optimization; novel applications and new game models