Patrick Felke

Noureddine Boucif, Frederik Golchert, Alexander Siemer et al.

This paper describes two denial of service attacks against the Z-Wave protocol and their effects on smart home gateways. Both utilize modified unencrypted packets, which are used in the inclusion phase and during normal operation. These are the commands Nonce Get/S2 Nonce Get and Find Nodes In Range. This paper shows how both can be manipulated and used to block a Z-Wave gateway's communication processing which in turn disables the whole Z-Wave network connected to it

Pal Ellingsen, Patrick Felke, Constanza Riera et al.

In this paper we define a new (output) multiplicative differential, and the corresponding $c$-differential uniformity. With this new concept, even for characteristic $2$, there are perfect $c$-nonlinear (PcN) functions. We first characterize the $c$-differential uniformity of a function in terms of its Walsh transform. We further look at some of the known perfect nonlinear (PN) and show that only one remains a PcN function, under a different condition on the parameters. In fact, the $p$-ary Gold PN function increases its $c$-differential uniformity significantly, under some conditions on the parameters. We then precisely characterize the $c$-differential uniformity of the inverse function (in any dimension and characteristic), relevant for the Rijndael (and Advanced Encryption Standard) block cipher.