@misc{cryptoeprint:2012:033,
author = {Sihem Mesnager and Jean-Pierre Flori},
title = {A note on hyper-bent functions via Dillon-like exponents},
howpublished = {Cryptology ePrint Archive, Report 2012/033},
year = {2012},
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.