This report describes the work that has been done within the FoT project Analys av koncept och teknik för cyberförsvar och informationssäkerhet (Analysis of concepts and technology for cyber defence and information security) during 2021-2025. The project has been conducted as a number of separate studies and has evaluated technologies and methods for strengthening the security in IT systems. The report summarizes the results of these studies and describes the other activities performed within the project.