@misc{cryptoeprint:2015:875,
author = {Ne\c{s}e Ko\c{c}ak, Sihem Mesnager and Ferruh \"{O}zbudak},
title = {Bent and Semi-bent Functions via Linear Translators},
howpublished = {Cryptology ePrint Archive, Report 2015/875},
year = {2015},
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.