@misc{cryptoeprint:2011:621,
    author = {Zhenfu Cao,  Zongyang  Zhang , Yunlei Zhao},
    title = {Adaptive Security of Concurrent Non-Malleable Zero-Knowledge},
    howpublished = {Cryptology ePrint Archive, Report 2011/621},
    year = {2011},
    url = {http://eprint.iacr.org/2011/621},
}