Cryptology ePrint Archive: BibTeX Citation of Report 2003/005

@misc{cryptoeprint:2003:005,
    author = {Keith M. Martin, Rei Safavi-Naini, Huaxiong Wang and Peter R. Wild},
    title = {Distributing the Encryption and Decryption of a Block Cipher},
    howpublished = {Cryptology ePrint Archive, Report 2003/005},
    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.