@misc{cryptoeprint:2014:810,
author = {Vincenzo Iovino and Karol Zebrowski},
title = {Simulation-Based Secure Functional Encryption in the Random Oracle Model},
howpublished = {Cryptology ePrint Archive, Report 2014/810},
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.