@misc{cryptoeprint:2014:883,
author = {Pei Luo and Yunsi Fei},
title = {Faulty Clock Detection for Crypto Circuits Against Differential Fault Analysis Attack},
howpublished = {Cryptology ePrint Archive, Report 2014/883},
year = {2014},
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.