Cryptology ePrint Archive: BibTeX Citation of Report 2006/071

@misc{cryptoeprint:2006:071,
    author = {Ueli Maurer and Johan Sjödin},
    title = {A Fast and Key-Efficient Reduction of Chosen- Ciphertext to Known-Plaintext Security},
    howpublished = {Cryptology ePrint Archive, Report 2006/071},
    year = {2006},
    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.