@misc{cryptoeprint:2008:301,
    author = {Yunfeng Li, Dake He, Xianhui Lu},
    title = {Accountability of Perfect Concurrent Signature},
    howpublished = {Cryptology ePrint Archive, Report 2008/301},
    year = {2008},
    url = {http://eprint.iacr.org/2008/301},
}