@misc{cryptoeprint:2015:573,
author = {Ming-Deh A. Huang and Michiel Kosters and Sze Ling Yeo},
title = {Last fall degree, HFE, and Weil descent attacks on ECDLP},
howpublished = {Cryptology ePrint Archive, Report 2015/573},
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.