@misc{cryptoeprint:2010:325,
author = {Zhenli Dai and Meiqin Wang and Yue Sun},
title = {Effect of the Dependent Paths in Linear Hull},
howpublished = {Cryptology ePrint Archive, Report 2010/325},
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.