Security

Using ProVerif to Analyze Protocols With Diffie-Hellman Exponentiation

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Executive Summary

ProVerif is one of the most successful tools for cryptographic protocol analysis. However, dealing with algebraic properties of operators such as the eXclusive OR (XOR) and Diffie-Hellman exponentiation has been problematic. Recently, the authors have developed an approach which enables ProVerif, and related tools, to analyze a large class of protocols that employ the XOR operator. In this paper, they adapt this approach to the case of Diffie-Hellman exponentiation. The core of their approach is to reduce the derivation problem for Horn theories modulo algebraic properties of Diffie-Hellman exponentiation to a purely syntactical derivation problem for Horn theories.

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