A model-based approach to analysis of authentication protocols

The paper presents the OF-APSAF integrated framework for authention protocol analysis. The framework is built on top of a well-established formal method CSP and its supporting tools: Casper and FDR. The integral part of OF-APSAF is the object-oriented semi-formal approach to modelling of cryptographic protocols, their application context and security requirements. The modelling is based on UML and a catalogue of specialised analytical patterns. Object-orientation helps to cope with the complexity inherent to the domain of security protocols verification and formal methods in general.