Luca Compagna

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AVISPA is a push-button tool for the automated validation of Internet security-sensitive protocols and applications. It provides a modular and expressive formal language for specifying protocols and their security properties, and integrates different back-ends that implement a variety of state-of-the-art automatic analysis techniques. To the best of our(More)
This paper presents HLPSL, a high-level protocol specification language for the modelling of security-sensitive protocols. This language has a formal semantics based on Lamport’s Temporal Logic of Actions. HLPSL is modular and allows for the specification of control flow patterns, data-structures, alternative intruder models, and complex security(More)
We present a model checking technique for security protocols based on a reduction to propositional logic. At the core of our approach is a procedure that, given a description of the protocol in a multi-set rewriting formalism and a positive integer k, builds a propositional formula whose models (if any) correspond to attacks on the protocol. Thus, finding(More)
We present SATMC 3.0, a SAT-based bounded model checker for security-critical systems that stems from a successful combination of encoding techniques originally developed for planning with techniques developed for the analysis of reactive systems. SATMC has been successfully applied in a variety of application domains (security protocols, security-sensitive(More)
Most model checking techniques for security protocols make a number of simplifying assumptions on the protocol and/or on its execution environment that prevent their applicability in some important cases. For instance, most techniques assume that communication between honest principals is controlled by a Dolev -Yao intruder, i.e. a malicious agent capable(More)
Single-Sign-On (SSO) protocols enable companies to establish a federated environment in which clients sign in the system once and yet are able to access to services offered by different companies. The OASIS Security Assertion Markup Language (SAML) 2.0 Web Browser SSO Profile is the emerging standard in this context. In this paper we provide formal models(More)
In previous work we showed that automatic SAT-based model-checking techniques based on a reduction of protocol (in)security problems to a sequence of propositional satisfiability problems can be used to effectively find attacks on protocols. In this paper we present an optimized intruder model that may lead in many cases to shorter attacks which can be(More)
We present SATMC 3.0, a SAT-based bounded model checker for security-critical systems that stems from a successful combination of encoding techniques originally developed for planning with techniques developed for the analysis of reactive systems. SATMC has been successfully applied in variety of application domains (security protocols, security-sensitive(More)
Security protocols have been analysed focusing on a variety of properties to withstand the Dolev-Yao attacker. The Multi-Attacker treat model allows each protocol participant to behave maliciously intercepting and forging messages. Each principal may then behave as a Dolev-Yao attacker while neither colluding nor sharing knowledge with anyone else. This(More)