@misc{cryptoeprint:2013:244,
author = {Ted Hurley},
title = {Cryptographic schemes, key exchange, public key.},
howpublished = {Cryptology ePrint Archive, Report 2013/244},
year = {2013},
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.