@misc{cryptoeprint:2013:410,
author = {Yossi Gilad and Amir Herzberg},
title = {Plug-and-Play IP Security: Anonymity Infrastructure Instead of PKI},
howpublished = {Cryptology ePrint Archive, Report 2013/410},
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.