Contents 1 Summary 1 2 Past Research Activities 1 2.1 Automated Deduction for Modal and Dynamic Logics . . . . . . . . . . . . . . . . . 2 2.2 Formal Verification of Computer Security . . . . . . . . . . . . . . . . . . . . . . . . 2 2.3 Anytime Approximate Reasoning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.4 Knowledge Representation and Reasoning . . . . . . . . . . . . . . . . . . . . . . . . 3 3 Future Research Activities 3 3.1 Computational and Experimental Analysis for Deduction Systems with Modal and Dynamic Logics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.2 Formal Verification of Security Protocols . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.3 Logical Cryptanalysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Past Research Activities My major research interest has been (and still is) the development of methods and techniques for a