@misc{cryptoeprint:2002:012,
    author = {F. Hess},
    title = {Exponent Group Signature Schemes and Efficient Identity Based Signature Schemes Based on Pairings},
    howpublished = {Cryptology ePrint Archive, Report 2002/012},
    year = {2002},
    url = {http://eprint.iacr.org/2002/012},
}