@misc{cryptoeprint:2009:166,
author = {Valerie Nachef and Jacques Patarin},
title = {I shall love you up to the death},
howpublished = {Cryptology ePrint Archive, Report 2009/166},
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.