Cryptology ePrint Archive: Report 2012/289

Ring Group Signatures

Liqun Chen

Abstract: In many applications of group signatures, not only a signer's identity but also which group the signer belongs to is sensitive information regarding signer privacy. In this paper, we study these applications and combine a group signature with a ring signature to create a ring group signature, which specifies a set of possible groups without revealing which member of which group produced the signature. The main contributions of this paper are a formal definition of a ring group signature scheme and its security model, a generic construction and a concrete example of such a scheme. Both the construction and concrete scheme are provably secure if the underlying group signature and ring signature schemes are secure.

Category / Keywords: public-key cryptography / ring signatures, group signatures, ring group signatures, group-ambiguity.

Publication Info: The 11th IEEE International Conference on Trust, Security and Privacy in Computing and Communications

Date: received 23 May 2012

Contact author: liqun chen at hp com

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Version: 20120529:202130 (All versions of this report)

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