Verifier-Local revocation group signature schemes with backward unlinkability from bilinear maps

  • Authors:
  • Toru Nakanishi;Nobuo Funabiki

  • Affiliations:
  • Department of Communication Network Engineering, Okayama University, Okayama, Japan;Department of Communication Network Engineering, Okayama University, Okayama, Japan

  • Venue:
  • ASIACRYPT'05 Proceedings of the 11th international conference on Theory and Application of Cryptology and Information Security
  • Year:
  • 2005

Quantified Score

Hi-index 0.00

Visualization

Abstract

An approach of membership revocation in group signatures is verifier-local revocation (VLR for short). In this approach, only verifiers are involved in the revocation mechanism, while signers have no involvement. Thus, since signers have no load, this approach is suitable for mobile environments. Although Boneh and Shacham recently proposed a VLR group signature scheme from bilinear maps, this scheme does not satisfy the backward unlikability. The backward unlikability means that even after a member is revoked, signatures produced by the member before the revocation remain anonymous. In this paper, we propose VLR group signature schemes with the backward unlinkability from bilinear maps.