@misc{cryptoeprint:2013:501,
author = {Jianxiong Shao and Dengguo Feng and Yu Qin},
title = {Type-Based Analysis of Protected Storage in the TPM (full version)},
howpublished = {Cryptology ePrint Archive, Report 2013/501},
year = {2013},
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.