Cryptology ePrint Archive: Report 2007/186

Fully Anonymous Group Signatures without Random Oracles

Jens Groth

Abstract: We construct a new group signature scheme using bilinear groups. The group signature scheme is practical, both keys and group signatures consist of a constant number of group elements, and the scheme permits dynamic enrollment of new members. The scheme satisfies strong security requirements, in particular providing protection against key exposures and not relying on random oracles in the security proof.

Category / Keywords: Group signatures, certified signatures, bilinear groups

Publication Info: To appear at Asiacrypt 2007 - this is the full version

Date: received 18 May 2007, last revised 6 Sep 2007

Contact author: j groth at ucl ac uk

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Version: 20070907:052313 (All versions of this report)

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