@misc{cryptoeprint:2009:499,
    author = {Chifumi Sato and Takeshi Okamoto and Eiji Okamoto},
    title = {Underlying Assumptions and Designated Verifier Signatures},
    howpublished = {Cryptology ePrint Archive, Report 2009/499},
    year = {2009},
    url = {http://eprint.iacr.org/2009/499},
}