The paper deals with the synchronization of a new statistically highly performant function firstly introduced by Lozi. The synchronization is reached via observers which reconstruct all the states of the original system, using only a partial information of it. The map has been rewritten as a piece-wise affine one, which allows to design two types of… (More)
The complexity of chaotic maps, exhibiting deterministic, but also stochastic features makes them very promising candidates in the rush for new and secure communication technologies. However, most of the chaotic systems proposed in the litterature turned out to be unsuitable for chaotic encryption, since they don't satisfy the required spectral and… (More)
The paper presents a novel chaotic encryption algorithm which can be used to improve the communication security. An uncomplicated process of chaotic substitution permutation network (SPN) with variable control parameters is proposed to form a robust chaotic cryptosystem. A new chaotic generator, firstly proposed by Lozi, is used for this purpose. For the… (More)
This paper deals with chaotic cryptosystem and observer-based chaotic synchronization of Lozi chaotic generator for secure information transmission. Increasing the size of the secret key has been achieved thanks to the G-interval parameter method for observability analysis of a Lozi chaotic generator.
We propose a new mechanism for undersampling chaotic numbers obtained by the ring coupling of one-dimensional maps. In the case of 2 coupled maps this mechanism allows the building of a PRNG which passes all NIST Test. This new geometric undersampling is very effective for generating 2 parallel streams of pseudo-random numbers, as we show, computing… (More)
In this paper an improved chaotic switching algorithm based on modified Lozi system is applied. Generally speaking, the main advantage of the switched encrypted model is its robustness to the noise, while the main drawback is the slow processing speed. In this article we propose to gain model productivity by adjusting parameter in Lozi chaotic generator.… (More)
The paper deals with the synchronization of two chaotic Sigma-Delta Modulators. The synchronization is reached via two modulators: one of the modulators is used to code the input information into a bitstream, while the second demodulator is used to decode the obtained bitstream into the original state of the applied input signal. In this way, the system… (More)
In this paper, we design and implement under Matlab/Simulink some efficient digital chaotic generators for data encryption/decryption process. Some of these generators (logistic, PWLCM, Frey) are known, the others xcos(x), xexp[cos(x)], 2-D Tmap) are proposed. A number of designed generators contain cascaded layer to improve the statistical properties of… (More)