@misc{cryptoeprint:2014:475,
author = {Imran Erguler},
title = {A Key Recovery Attack on Error Correcting Code Based a Lightweight Security Protocol},
howpublished = {Cryptology ePrint Archive, Report 2014/475},
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.