@misc{cryptoeprint:2012:052,
    author = {Alexandra Boldyreva and Vipul Goyal and Virendra Kumar},
    title = {Identity-based Encryption with Efficient Revocation},
    howpublished = {Cryptology ePrint Archive, Report 2012/052},
    year = {2012},
    url = {http://eprint.iacr.org/2012/052},
}