Cryptology ePrint Archive: BibTeX Citation of Report 2002/042

@misc{cryptoeprint:2002:042,
    author = {Edith Elkind and Amit Sahai},
    title = {A Unified Methodology For Constructing Public-Key Encryption Schemes Secure Against Adaptive Chosen-Ciphertext Attack},
    howpublished = {Cryptology ePrint Archive, Report 2002/042},
    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.