Cross-Unlinkable Hierarchical Group Signatures

Julien Bringer; Herve Chabanne; Alain Patey

Paper 2012/407

Cross-Unlinkable Hierarchical Group Signatures

Julien Bringer, Herve Chabanne, and Alain Patey

Abstract

We introduce the notion of Cross-Unlinkability for group signature schemes. Considering groups organized in a tree structure, where belonging to the parent group is required to join a new group, Cross-Unlinkability enables a cascade revocation process that takes into account the underlying tree structure, while ensuring anonymity for non-revoked users, in particular, towards the managers of the other groups. We show how to achieve Cross-Unlinkability using the Verifier-Local Revocation group signature scheme of Bringer and Patey at Secrypt 2012, by exploiting its property of Backward Unlinkability.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. EuroPKI 2012
Keywords: Anonymity Unlinkability Group Signatures
Contact author(s): alain patey @ telecom-paristech fr
History: 2012-07-25: revised; 2012-07-24: received; See all versions
Short URL: https://ia.cr/2012/407
License: CC BY

BibTeX

@misc{cryptoeprint:2012/407,
      author = {Julien Bringer and Herve Chabanne and Alain Patey},
      title = {Cross-Unlinkable Hierarchical Group Signatures},
      howpublished = {Cryptology {ePrint} Archive, Paper 2012/407},
      year = {2012},
      url = {https://eprint.iacr.org/2012/407}
}