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Foundations for Group Signatures: Simplified Requirements and a Construction Based on General Assumptions

Mihir Bellare, Daniele Micciancio, Bogdan Warinschi, Foundations for Group Signatures: Simplified Requirements and a Construction Based on General Assumptions . Advances in cryptology - {EUROCRYPT} 2003, pp. 614–629. June 2003. No electronic version available.

Abstract

This paper provides theoretical foundations for the group signature primitive. We introduce strong, formal definitions for the core requirements of anonymity and traceability. We then show that these imply the large set of sometimes ambiguous existing informal requirements in the literature, thereby unifying and simplifying the requirements for this primitive. Finally we prove the existence of a construct meeting our definitions based only on the assumption that trapdoor permutations exist.

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