2007•Unpublished venueRequires access

Flaw of A Dynamic Group Signature Scheme

Yan Jiang

Abstract

A dynamic group signature scheme based on CS97 scheme is discussed in this paper.The concept of signature of knowledge is adopted in this scheme .The dynamic group signature scheme has high efficiency of group member's joining and revocation .The length of the signature and the computing of signing and verifying is independent on the number of group members.A security flaw is identified in this scheme.The analysis of the security flaw is proposed that the revocated member can forge previous signature without awareness.

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Available abstract

Key concepts: Group signature, Ring signature, Signature (topology), Scheme (mathematics), Revocation, Group (periodic table), ElGamal signature scheme, Computer science