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Issue title: 7th International Workshop on Issues in the Theory of Security (WITS'07)
Guest editors: Riccardo Focardi
Article type: Research Article
Authors: Kremer, Stevea | Mazaré, Laurentb
Affiliations: [a] LSV, ENS Cachan & CNRS & INRIA, Cachan, France. E-mail: kremer@lsv.ens-cachan.fr | [b] LexiFi SAS, Boulogne-Billancourt, France. E-mail: laurent.mazare@polytechnique.org
Abstract: In this paper, we introduce a symbolic model to analyse protocols that use a bilinear pairing between two cyclic groups. This model consists in an extension of the Abadi–Rogaway logic and we prove that the logic is still computationally sound: symbolic indistinguishability implies computational indistinguishability provided that the Bilinear Decisional Diffie–Hellman assumption holds and that the encryption scheme is IND-CPA secure. We illustrate our results on classical protocols using bilinear pairing like Joux tripartite Diffie–Hellman protocol or the TAK-2 and TAK-3 protocols. We also investigate the security of a newly designed variant of the Burmester–Desmedt protocol using bilinear pairings. More precisely, we show for each of these protocols that the generated key is indistinguishable from a random element.
Keywords: Security, formal methods, Dolev–Yao model, computational soundness, bilinear pairing
DOI: 10.3233/JCS-2009-0388
Journal: Journal of Computer Security, vol. 18, no. 6, pp. 999-1033, 2010
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