@misc{cryptoeprint:2007:213,
    author = {Sujing Zhou and Dongdai Lin},
    title = {Unlinkable Randomizable  Signature and Its Application in Group Signature},
    howpublished = {Cryptology ePrint Archive, Report 2007/213},
    year = {2007},
    url = {http://eprint.iacr.org/2007/213},
}