@misc{cryptoeprint:2008:024,
    author = {Sunder Lal and Vandani Verma},
    title = {Identity Based Strong Bi-Designated Verifier Proxy Signature Schemes},
    howpublished = {Cryptology ePrint Archive, Report 2008/024},
    year = {2008},
    url = {http://eprint.iacr.org/2008/024},
}