@misc{cryptoeprint:2008:314,
author = {Miroslaw Kutylowski and Filip Zagorski},
title = {Scratch, Click & Vote: E2E voting over the Internet},
howpublished = {Cryptology ePrint Archive, Report 2008/314},
year = {2008},
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.