Abstract
An electronic contract signing protocol is a fair exchange protocol where the parties exchange their signature on a contract. Some contract signing protocols have been presented, and usually they come with an informal analysis. In this paper we use Colored Petri Nets to formally verify the fairness and the resistance to five previously described attacks of FPH contract signing protocol. We have modeled the protocol and the roles of the signers, a trusted third party, malicious signers as well as the role of an intruder. We have proven that the protocol is resistant to typical attacks. However, we have detected three cases where the protocol generates contradictory evidences. Finally, we have explained which should be the behavior of an arbiter to allow the resolution of these conflicting situations.
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© 2009 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering
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Payeras-Capellà, M., Mut-Puigserver, M., Isern-Deyà, A.P., Ferrer-Gomila, J.L., Huguet-Rotger, L. (2009). Formal Analysis of FPH Contract Signing Protocol Using Colored Petri Nets. In: Chen, Y., Dimitriou, T.D., Zhou, J. (eds) Security and Privacy in Communication Networks. SecureComm 2009. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 19. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-05284-2_7
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DOI: https://doi.org/10.1007/978-3-642-05284-2_7
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