@misc{cryptoeprint:2010:017,
author = {Paulo S. L. M. Barreto and Rafael Misoczki},
title = {A new one-time signature scheme from syndrome decoding},
howpublished = {Cryptology ePrint Archive, Report 2010/017},
year = {2010},
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.