@misc{cryptoeprint:2008:290,
    author = {Brent Waters},
    title = {Ciphertext-Policy Attribute-Based Encryption: An Expressive, Efficient, and Provably Secure Realization},
    howpublished = {Cryptology ePrint Archive, Report 2008/290},
    year = {2008},
    url = {http://eprint.iacr.org/2008/290},
}