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