Cryptology ePrint Archive: BibTeX Citation of Report 2012/365

@misc{cryptoeprint:2012:365,
    author = {Wang Shao-hui, Chen Dan-wei, Wang Zhi-wei, Chang Su-qin},
    title = {Public Auditing for Ensuring Cloud Data Storage Security With Zero Knowledge Privacy},
    howpublished = {Cryptology ePrint Archive, Report 2012/365},
    year = {2012},
    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.