@misc{cryptoeprint:2014:1018,
author = {Martin R. Albrecht and Carlos Cid and Jean-Charles Faugère and Ludovic Perret},
title = {Algebraic Algorithms for LWE},
howpublished = {Cryptology ePrint Archive, Report 2014/1018},
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.