Cryptology ePrint Archive: BibTeX Citation of Report 2003/181

@misc{cryptoeprint:2003:181,
    author = {Rui Zhang and Goichiro Hanaoka and Junji Shikata and Hideki Imai},
    title = {On the Security of Multiple Encryption or CCA-security+CCA-security=CCA-security?},
    howpublished = {Cryptology ePrint Archive, Report 2003/181},
    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.