# A new almost perfect nonlinear function which is not quadratic

@article{Edel2009ANA, title={A new almost perfect nonlinear function which is not quadratic}, author={Yves Edel and Alexander Pott}, journal={Adv. Math. Commun.}, year={2009}, volume={3}, pages={59-81} }

Following an example in [12],
we show how to change one coordinate function of an
almost perfect nonlinear
(APN) function in order to obtain new examples. It turns out that
this is a very powerful method to construct new
APN functions. In particular, we show that our approach can
be used to construct a ''non-quadratic'' APN function.
This new example
is in remarkable contrast to all recently constructed functions which
have all been quadratic.
An equivalent function has been found… Expand

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