@misc{cryptoeprint:2012:654,
    author = {Qiang Tang and Yuanjie Zhao and Xiaofeng Chen and Hua Ma},
    title = {Refine the Concept of Public Key Encryption with Delegated Search},
    howpublished = {Cryptology ePrint Archive, Report 2012/654},
    year = {2012},
    url = {http://eprint.iacr.org/2012/654},
}