Cryptology ePrint Archive: Report 2004/299

Security Flaws in a Pairing-based Group Signature Scheme

Zhengjun Cao and Sherman S.M. Chow

Abstract: Deng and Zhao recently proposed a group signature scheme. We find that the scheme cannot satisfy all of the requirements of a secure group signature.

Category / Keywords: cryptographic protocols / group signature scheme, bilinear pairings, Gap-Diffie-Hellman group, unforgeability, anonymity, linkability, exculpability, traceability, coalition-resistance

Date: received 11 Nov 2004, last revised 19 Nov 2004

Contact author: zjcamss at hotmail com

Available format(s): Postscript (PS) | Compressed Postscript (PS.GZ) | PDF | BibTeX Citation

Version: 20041119:083111 (All versions of this report)

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