Specification and verification of cryptographic protocols based on TCPL

To facilitate the analysis of cryptographic protocols, based on time-dependent cryptographic protocol logic (TCPL), a method to specify logic formulas in XML is given. And then, a method to automatically verify cryptographic protocol is provided. In this method, the goals of the protocol are reduced to a set of sub-goals, and continually using the similar reduction on these sub-goals will at last lead to some given conditions. Thus, the validness of the given conditions will make the goals valid. Proof shows that our method is sound. Moreover, it can make the process to analyze cryptographic protocols automated and efficient.