Cryptology ePrint Archive: BibTeX Citation of Report 2002/033

@misc{cryptoeprint:2002:033,
    author = {Yodai Watanabe and Junji Shikata and Hideki Imai},
    title = {Equivalence between semantic security and indistinguishability against chosen ciphertext attacks},
    howpublished = {Cryptology ePrint Archive, Report 2002/033},
    year = {2002},
    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.