DELP: Dynamic Epistemic Logic for Security Protocols

The formal analysis of security protocols is a challenging field, with various approaches being studied nowadays. The famous Burrows-Abadi-Needham Logic was the first logical system aiming to validate security protocols. Combining ideas from previous approaches, in this paper we define a complete system of \textit{dynamic epistemic logic} for modeling security protocols. Our logic is implemented, and few of its properties are verifyied, using the theorem prover Lean.