@misc{cryptoeprint:2015:207,
author = {Tobias Schneider and Amir Moradi},
title = {Leakage Assessment Methodology - a clear roadmap for side-channel evaluations},
howpublished = {Cryptology ePrint Archive, Report 2015/207},
year = {2015},
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.