@misc{cryptoeprint:2014:586,
author = {Vipul Goyal and Silas Richelson and Alon Rosen and Margarita Vald},
title = {An Algebraic Approach to Non-Malleability},
howpublished = {Cryptology ePrint Archive, Report 2014/586},
year = {2014},
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.