Cryptology ePrint Archive: BibTeX Citation of Report 2007/225

@misc{cryptoeprint:2007:225,
    author = {Shengli Liu and Xiaofeng Chen and Fangguo Zhang},
    title = {On the Forgeability of Wang-Tang-Li's ID-Based Restrictive Partially Blind Signature},
    howpublished = {Cryptology ePrint Archive, Report 2007/225},
    year = {2007},
    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.