@misc{cryptoeprint:2006:118,
author = {Sugata Gangopadhyay and Deepmala Sharma},
title = {On construction of non-normal Boolean functions},
howpublished = {Cryptology ePrint Archive, Report 2006/118},
year = {2006},
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.