@misc{cryptoeprint:2011:693,
author = {Bin Wang ,Qing Zhao and Ke Dai},
title = {A non-interactive deniable authentication scheme in the standard model},
howpublished = {Cryptology ePrint Archive, Report 2011/693},
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.