@misc{cryptoeprint:2015:400,
    author = {Stephen R. Tate and Roopa Vishwanathan},
    title = {Expiration and Revocation of Keys for Attribute-based Signatures (Full Version)},
    howpublished = {Cryptology ePrint Archive, Report 2015/400},
    year = {2015},
    url = {https://eprint.iacr.org/2015/400},
}