@misc{cryptoeprint:2008:047,
    author = {Vicente Benjumea and  Seung Geol Choi and Javier Lopez and Moti Yung},
    title = {Fair Traceable Multi-Group Signatures},
    howpublished = {Cryptology ePrint Archive, Report 2008/047},
    year = {2008},
    url = {http://eprint.iacr.org/2008/047},
}