@misc{cryptoeprint:2013:752,
author = {Angelo De Caro and Vincenzo Iovino},
title = {On the Power of Rewinding Simulators in Functional Encryption},
howpublished = {Cryptology ePrint Archive, Report 2013/752},
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.