@misc{cryptoeprint:2011:402,
    author = {Essam Ghadafi},
    title = {Formalizing Group Blind Signatures  and Practical Constructions in the Standard Model},
    howpublished = {Cryptology ePrint Archive, Report 2011/402},
    year = {2011},
    url = {http://eprint.iacr.org/2011/402},
}