University of Luton
Graphical security models provide an intuitive but systematic methodology to visualize possible attacks and countermeasures and to enable the computation of various security related parameters. The ADTool is free, open source software assisting graphical modeling and quantitative analysis of security, using attack-defense trees. The main features of the ADTool are easy creation, efficient editing, and automated bottom-up evaluation of security-relevant measures. The tool also supports the usage of attack trees, protection trees and defense trees, which are all particular instances of attack-defense trees.