A Formal Security Analysis of an OSA/Parlay Authentication Interface

Ricardo Corin, Gaetano Di Caprio, Sandro Etalle, Stefania Gnesi, Gabriele Lenzini, Corrado Moiso

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    This paper analyzes the security of the Trust and Security Management (TSM) protocol, an authentication protocol which is part of the Parlay/OSA Application Program Interfaces (APIs). Architectures based on Parlay/OSA APIs allow third party service providers to develop new services that can access, in a controlled and secure way, to those network capabilities offered by the network operator. Role of the TSM protocol, run by network gateways, is to authenticate the client applications trying to access and use the network capabilities features offered. For this reason potential security flaws in its authentication strategy can bring to unauthorized use of network with evident damages to the operator and to the quality of the services. This paper shows how a rigorous formal analysis of TSM underlines serious weaknesses in the model describing its authentication procedure. This usually means that also the original system (i.e., the TSM protocol itself) hides the same flaws. The paper relates about the design activity of the formal model, the tool-aided verification performed and the security flaws discovered. This will allow us to discuss about how the security of the TSM protocol can be generally improved.
    Original languageEnglish
    Title of host publicationFormal Methods for Open Object-Based Distributed Systems
    Subtitle of host publication7th IFIP WG 6.1 International Conference, FMOODS 2005, Athens, Greece, June 15-17, 2005. Proceedings
    EditorsMartin Steffen, Gianluigi Zavattaro
    Place of PublicationBerlin, Heidelberg
    Number of pages16
    ISBN (Electronic)978-3-540-31556-8
    ISBN (Print)978-3-540-26181-0
    Publication statusPublished - Jun 2005
    Event7th IFIP WG 6.1 International Conference on Formal Methods for Open Object-Based Distributed Systems, FMOODS 2005 - Athens, Greece
    Duration: 15 Jun 200517 Jun 2005
    Conference number: 7

    Publication series

    NameLecture Notes in Computer Science
    ISSN (Print)0302-9743
    ISSN (Electronic)1611-3349


    Conference7th IFIP WG 6.1 International Conference on Formal Methods for Open Object-Based Distributed Systems, FMOODS 2005
    Abbreviated titleFMOODS


    • SCS-Cybersecurity
    • Formal verification of security
    • OSA/Parlay API
    • Industrial test case


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