@misc{cryptoeprint:2003:133,
author = {Soumen Maity and Subhamoy Maitra},
title = {Minimum Distance between Bent and 1-resilient Boolean Functions},
howpublished = {Cryptology ePrint Archive, Report 2003/133},
year = {2003},
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.