@misc{cryptoeprint:2010:567,
author = {CLAUDE CARLET AND SIHEM MESNAGER},
title = {ON DILLON'S CLASS H OF BENT FUNCTIONS, NIHO BENT FUNCTIONS AND O-POLYNOMIALS},
howpublished = {Cryptology ePrint Archive, Report 2010/567},
year = {2010},
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.