Cryptology ePrint Archive: Report 2003/090

A Structured Multisignature Scheme from the Gap Diffie-Hellman Group

Chih-Yin Lin and Tzong-Chen Wu and Fangguo Zhang

Abstract: In this paper, the authors propose a new structured multisignature scheme that considers the signing order among co-signers. The proposed scheme can resolve signing structures of serial, parallel, and the mix of them. Moreover, the size and the verification of a structured multisignature is the same as those of an individual signature generated by any co-signer. Arithmetically, the proposed scheme makes use of the Gap Diffie-Hellman (GDH) signature scheme recently presented by Boneh, Shacham, and Lynn. Due to the underlying GDH group, our scheme has the merits of simplicity in construction and efficiency in performance.

Category / Keywords: public-key cryptography / multisignature, structured multisignature, Gap Diffie-Hellman

Date: received 6 May 2003

Contact author: lincy at iim nctu edu tw

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Version: 20030507:185130 (All versions of this report)

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