Cryptology ePrint Archive: BibTeX Citation of Report 2003/232

@misc{cryptoeprint:2003:232,
    author = {Chunming Tang and Zhuojun Liu and Jinwang Liu},
    title = {The Statistical Zero-knowledge Proof for Blum Integer Based on Discrete Logarithm},
    howpublished = {Cryptology ePrint Archive, Report 2003/232},
    year = {2003},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.