@misc{cryptoeprint:2011:700,
    author = {Tatsuaki Okamoto and Katsuyuki Takashima},
    title = {Efficient Attribute-Based Signatures for Non-Monotone Predicates in the Standard Model},
    howpublished = {Cryptology ePrint Archive, Report 2011/700},
    year = {2011},
    url = {http://eprint.iacr.org/2011/700},
}