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Implementing Group Signature Schemes With Smart Cards

Sébastien Canard and Marc Girault
France Telecom R&D
42 rue des Coutures - BP 6243
F-14066 Caen Cedex, France


Group signature schemes allow a group member to sign messages on behalf of the group. Such signatures must be anonymous and unlinkable but, whenever needed, a designated group manager can reveal the identity of the signer. During the last decade group signatures have been playing an important role in cryptographic research; many solutions have been proposed and some of them are quite efficient, with constant size of signatures and keys ([1], [6], [7] and [15]). However, some problems still remain among which the large number of computations during the signature protocol and the difficulty to achieve coalition-resistance and to deal with member revocation. In this paper we investigate the use of a tamper-resistant device (typically a smart card) to efficiently solve those problems.

This paper was originally published in the Proceedings of the Fifth Smart Card Research and Advanced Application Conference, November 21–22, 2002, San Jose, CA, USA
Last changed: 11 Oct. 2002 aw
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