@misc{cryptoeprint:2008:159,
author = {Bin Wang},
title = {A non-interactive deniable authentication scheme based on designated verifier proofs},
howpublished = {Cryptology ePrint Archive, Report 2008/159},
year = {2008},
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.