@misc{cryptoeprint:2010:190,
author = {Feng Hao and Peter Ryan},
title = {J-PAKE: Authenticated Key Exchange Without PKI},
howpublished = {Cryptology ePrint Archive, Report 2010/190},
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.