Please reference the following conference paper in addition to the technical report:

@inproceedings{blac-ccs07,
  author = {Patrick P. Tsang and  Man Ho Au and Apu Kapadia and Sean W. Smith},
  title = "{Blacklistable Anonymous Credentials: Blocking Misbehaving Users without {TTPs}}",
  booktitle = {Proceedings of the 14th ACM Conference on Computer and Communications Security ({CCS})},
  pages = {72--81},
  doi = {10.1145/1315245.1315256},
  month = oct # "/" # nov,
  year = {2007}
}

@TECHREPORT{blac-extended,
  author = {Patrick P. Tsang and Man Ho Au and Apu Kapadia  and Sean W. Smith},
  title = "{Blacklistable Anonymous Credentials: Blocking Misbehaving Users without {TTPs} (Extended Version)}",
  institution = {Department of Computer Science, Dartmouth College},
  year = {2007},
  number = {TR2007-603},
  month = sep,
  note = {This technical report is the extended version of the paper that appeared in CCS '07 under the same title}
}