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The use of chaotic maps to construct dynamic S-Box has been increasingly studied. The aim of this paper is to propose a new design of dynamic chaotic S-Box that enhances the security criteria of the block ciphers. In fact, our S-Box is based on the combination of two chaotic maps: one and three dimensional piecewise linear maps. The randomness of these maps was verified by using the NIST test package...
The substitution table or S-box is considered as the core of the block ciphers. The good design of the S-box can increase the cipher security and simplicity. The aim of this paper is to demonstrate the efficiency of the dynamic S-boxes based on one-dimensional chaotic maps compared to classic S-box and to evaluate the more suitable one dimensional map to construct a dynamic S-box used in the AES algorithm...
In this paper, we propose a new approach to compute the exact bit error rate expression for asynchronous chaos-based DS-CDMA system over multipath channel. Perfect estimation of the channel coefficients with the associated delays and chaos synchronization are assumed. A simple RAKE receiver structure is considered. A stationary multipath channel with constant gain is assumed. An asynchronous multi-user...
UWB technology possesses some important characteristics such as the robustness in multipath channel, the low probability of detection and interception, the relative simplicity of the systems, and the protected communication assured by UWB signals more difficult to detect that classic signals. The use of chaos for the UWB communications is put in this paper under survey with a more particular interest...
In this paper we propose a new system for achieving synchronization in asynchronous multi-user chaos-based DS-CDMA. The synchronization is made through a binary code used as a pilot signal and the chaotic signal used as spreading data sequence. The study of this process is evaluated under the assumption of an additive white Gaussian noise channel. The probability of detection and probability of false...
In this paper, an extension of the existing chaotic digital modulation named chaotic cyclic attractors shift keying (CCASK) is proposed, which uses different orders of chaotic cyclic attractors to modulate the information. The new scheme is analysed under a discrete-time domain, and the noise performance in AWGN channel is simulated, and also calculated in a mixed analytic-numerical way, under some...
In this paper, we explore some modeling capabilities of Scicos. Our aim is to generate chaos from a simple hybrid dynamical system. We give the chaotic dynamics of the current-programmed boost converter in open-loop circuit as a case study. By considering two bifurcation parameters the current reference and the voltage input, we observe that the obtained Scicos simulations show that the boost converter...
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