@misc{cryptoeprint:2008:167,
author = {Omkant Pandey},
title = {Non-black-box Techniques Are Not Necessary for Constant Round Non-malleable Protocols},
howpublished = {Cryptology ePrint Archive, Report 2008/167},
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.