Analyzing Cryptographic Protocols in a Reactive Framework

In this paper, we analyze the suitability of reactive frameworks for modelling and veri cation of cryptographic protocols. Our study shows that cryptographic protocols can be modelled easily and naturally including the communication feature of the Internet wherein a point-to-point communication could be interpreted as broadcast mechanism due to the underlying routing and LAN architectures. The reactive framework provides an eective modelling of attacks/intruders as well as the capturing of the security properties such as secrecy and authenticity as observers. The observer-based approach of synchronous reactive frameworks aids in the modelling of properties incrementally and the use of the simulate-compile-verify cycle of the synchronous programming environment