@misc{cryptoeprint:2010:344,
author = {Ezekiel J Kachisa},
title = {Generating more Kawazoe-Takahashi Genus 2 Pairing-friendly Hyperelliptic Curves.},
howpublished = {Cryptology ePrint Archive, Report 2010/344},
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.