Group Signatures with Verifier-Local Revocation and Backward Unlinkability in the Standard Model

Benoît Libert 1 Damien Vergnaud 2, 3
1 UCL Crypto Group - Microelectronics laboratory
2 CASCADE - Construction and Analysis of Systems for Confidentiality and Authenticity of Data and Entities
DI-ENS - Département d'informatique de l'École normale supérieure, Inria Paris-Rocquencourt, CNRS - Centre National de la Recherche Scientifique : UMR 8548
3 LIENS - Laboratoire d'informatique de l'école normale supérieure
Abstract : Group signatures allow users to anonymously sign messages in the name of a group. Membership revocation has always been a critical issue in such systems. In 2004, Boneh and Shacham formalized the concept of group signatures with verifier-local revocation where revocation messages are only sent to signature verifiers (as opposed to both signers and verifiers). This paper presents an efficient {verifier-local revocation group signature} (VLR-GS) providing backward unlinkability (i.e. previously issued signatures remain anonymous even after the signer's revocation) with a security proof in the standard model (i.e. without resorting to the random oracle heuristic).
Keywords : Group signatures veri er-local revocation bilinear maps backward unlinkability standard model
Type de document :
Communication dans un congrès
Juan A. Garay and Atsuko Miyaji and Akira Otsuka. International Conference on Cryptology And Network Security, CANS 2009, Dec 2009, Kanazawa, Japan. Springer, 5888, pp.498-517, 2009, Lecture Notes in Computer Science. 〈10.1007/978-3-642-10433-6_34〉
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Benoît Libert, Damien Vergnaud. Group Signatures with Verifier-Local Revocation and Backward Unlinkability in the Standard Model. Juan A. Garay and Atsuko Miyaji and Akira Otsuka. International Conference on Cryptology And Network Security, CANS 2009, Dec 2009, Kanazawa, Japan. Springer, 5888, pp.498-517, 2009, Lecture Notes in Computer Science. 〈10.1007/978-3-642-10433-6_34〉. 〈inria-00577255〉

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