@misc{cryptoeprint:2008:392,
author = {TIAN Yuan and WANG Ying},
title = {GUC-Secure Set-Intersection Computation},
howpublished = {Cryptology ePrint Archive, Report 2008/392},
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.