Cryptology ePrint Archive: BibTeX Citation of Report 2009/271

@misc{cryptoeprint:2009:271,
    author = {Rafael Dowsley and Goichiro Hanaoka and Hideki Imai and Anderson C. A. Nascimento},
    title = {Reducing the Ciphertext Size of Dolev-Dwork-Naor like Public Key Cryptosystems},
    howpublished = {Cryptology ePrint Archive, Report 2009/271},
    year = {2009},
    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.