Abstract
Model checking is a multi-purpose, automatic technique for verifying finite-state concurrent systems. Formal verification methods have quite recently become usable by industry. Presently model checking has been widely used in hardware, software validation and security protocol analysis. Fiat-Shamir is one of the many zero-knowledge authentication protocol which is used for security authentication purpose. In this paper, we have proposed a formal model of Fiat-Shamir authentication protocol using Finite State Machine (FSM). Security requirements are represented using Computation Tree Logic (CTL). These security requirements are verified and analyzed using symbolic model checker tool NuSMV. Based on our verification we have identified one of the security flaw of Fiat-Shamir protocol using the NuSMV model checker.KeywordsModel CheckingZero Knowledge Authentication ProtocolFiat-Shamir ProtocolCTLFinite State Machine (FSM)
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