@misc{cryptoeprint:2008:524,
    author = {Li Hongda and Feng dengguo and Li Bao and Xue Haixia},
    title = {Round-Optimal Zero-Knowledge Proofs of Knowledge for NP},
    howpublished = {Cryptology ePrint Archive, Report 2008/524},
    year = {2008},
    url = {http://eprint.iacr.org/2008/524},
}