@misc{cryptoeprint:2014:569,
author = {Daniele Micciancio and Michael Walter},
title = {Fast Lattice Point Enumeration with Minimal Overhead},
howpublished = {Cryptology ePrint Archive, Report 2014/569},
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.