@misc{cryptoeprint:2011:387,
author = {Jin Hong and Ga Won Lee and Daegun Ma},
title = {Analysis of the Parallel Distinguished Point Tradeoff},
howpublished = {Cryptology ePrint Archive, Report 2011/387},
year = {2011},
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.