@misc{cryptoeprint:2009:189,
    author = {Jian Weng and Sherman S.M. Chow and Yanjiang Yang and Robert H. Deng},
    title = {Efficient Unidirectional Proxy Re-Encryption},
    howpublished = {Cryptology ePrint Archive, Report 2009/189},
    year = {2009},
    url = {http://eprint.iacr.org/2009/189},
}