@misc{cryptoeprint:2014:832,
author = {Manfred Lochter, Johannes Merkle, Jörn-Marc Schmidt, Torsten Schütze},
title = {Requirements for Standard Elliptic Curves},
howpublished = {Cryptology ePrint Archive, Report 2014/832},
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.