@misc{cryptoeprint:2010:319,
    author = {Jian Weng and Yunlei Zhao},
    title = {On the Security of a Bidirectional Proxy Re-Encryption Scheme from PKC 2010},
    howpublished = {Cryptology ePrint Archive, Report 2010/319},
    year = {2010},
    url = {http://eprint.iacr.org/2010/319},
}