@misc{cryptoeprint:2011:136,
author = {Gilad Asharov and Yehuda Lindell},
title = {A Full Proof of the BGW Protocol for Perfectly-Secure Multiparty Computation},
howpublished = {Cryptology ePrint Archive, Report 2011/136},
year = {2011},
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.