@misc{cryptoeprint:2013:499,
author = {Pavel Hubacek and Jesper Buus Nielsen and Alon Rosen},
title = {Limits on the Power of Cryptographic Cheap Talk},
howpublished = {Cryptology ePrint Archive, Report 2013/499},
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.