@misc{cryptoeprint:2009:427,
author = {Stephen R. Tate and Roopa Vishwanathan},
title = {Efficient Verifiable Escrow and Fair Exchange with Trusted Hardware},
howpublished = {Cryptology ePrint Archive, Report 2009/427},
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.