Cryptology ePrint Archive: Report 2003/116

A New ID-based Group Signature Scheme from Bilinear Pairings

Xiaofeng Chen and Fangguo Zhang and Kwangjo Kim

Abstract: We argue that traditional ID-based systems from pairings seem unsuitable for designing group signature schemes due to the problem of key escrow. In this paper we propose new ID-based public key systems without trustful KGC from bilinear pairings. In our new ID-based systems, if dishonest KGC impersonates an honest user to communicate with others, the user can provide a proof of treachery of the KGC afterwards, which is similar to CA-based systems. Furthermore, we propose a group signature scheme under the new systems, the security and performance of which rely on the new systems. The size of the group public key and the length of the signature are independent on the numbers of the group.

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Date: received 3 Jun 2003, last revised 6 Aug 2003

Contact author: crazymount at icu ac kr

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Version: 20030806:075254 (All versions of this report)

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