Sökning: "decidability"
Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet decidability.
1. Verification of networks of communicating processes : Reachability problems and decidability issues
Sammanfattning : Computer systems are used in almost all aspects of our lives and our dependency on them keeps on increasing. When computer systems are used to handle critical tasks, any software failure can cause severe human and/or material losses. LÄS MER
2. Model Checking Parameterized Timed Systems
Sammanfattning : In recent years, there has been much advancement in the area of verification of infinite-state systems. A system can have an infinite state-space due to unbounded data structures such as counters, clocks, stacks, queues, etc. It may also be infinite-state due to parameterization, i.e. LÄS MER
3. On Simultaneous Rigid E-Unification
Sammanfattning : Automated theorem proving methods in classical logic with equality that are based on the Herbrand theorem, reduce to a problem called Simultaneous Rigid E-Unification, or SREU for short. Recent developments show that SREU has also close connections with intuitionistic logic with equality, second-order unification, some combinatorial problems and finite tree automata. LÄS MER
4. Logics of Knowledge and Cryptography : Completeness and Expressiveness
Sammanfattning : An understanding of cryptographic protocols requires that we examine the knowledge of protocol participants and adversaries: When a participant receives a message, does she know who sent it? Does she know that the message is fresh, and not merely a replay of some old message? Does a network spy know who is talking to whom? This thesis studies logics of knowledge and cryptography. Specifically, the thesis addresses the problem of how to make the concept of knowledge reflect feasible computability within a Kripke-style semantics. LÄS MER
5. Equivalences and Calculi for Formal Verification of Cryptographic Protocols
Sammanfattning : Security protocols are essential to the proper functioning of any distributed system running over an insecure network but often have flaws that can be exploited even without breaking the cryptography. Formal cryptography, the assumption that the cryptographic primitives are flawless, facilitates the construction of formal models and verification tools. LÄS MER