@misc{cryptoeprint:2009:085,
author = {Tao Feng and Xian Guo and Jianfeng Ma and Xinghua Li },
title = {UC-Secure Source Routing Protocol},
howpublished = {Cryptology ePrint Archive, Report 2009/085},
year = {2009},
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.