Reference

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

    (with Benoît Libert) International Conference on Cryptology And Network Security, CANS 2009
    (J. A. Garay, A. Miyaji & A. Otsuka eds.)
    Springer, Lect. Notes Comput. Sci. vol. 5888, 2009, p. 498-517
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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, verifier-local revocation, bilinear maps, backward unlinkability, standard model.

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