Cryptology ePrint Archive: BibTeX Citation of Report 2013/002

@misc{cryptoeprint:2013:002,
    author = {Yu Chen and Zongyang Zhang and Dongdai Lin and Zhenfu Cao},
    title = {Generalized (Identity-Based) Hash Proof System and Its Applications },
    howpublished = {Cryptology ePrint Archive, Report 2013/002},
    year = {2013},
    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.