Cryptology ePrint Archive: BibTeX Citation of Report 2009/339

@misc{cryptoeprint:2009:339,
    author = {Jue-Sam Chou*1, Yalin Chen2 , Ming-Hsun Cho3 , Hung-Min Sun4},
    title = {A Novel ID-based Electronic Cash System from Pairings},
    howpublished = {Cryptology ePrint Archive, Report 2009/339},
    year = {2009},
    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.