Feasibility of Analog Realization of a Sliding-Mode Observer: Application to Data Transmission

Circuit Simulation of an Analog Secure Communication based on Synchronized Chaotic Chua’s System

“…Since β = 0, the observability matching condition given in [4] is verified. Our objective is to synchronize receiver with transmitter and therefore, estimate the unknown informationm.…”

“…The system (4) is observable if the definition 3.7 in [4] is satisfied. To this end, system (4) can be written as:…”

“…This may well be one way to implement the principles of confusion and diffusion required by Shannon for cryptographic systems [2]. As a result, chaotic systems have been used for secure communication and different encryption systems based on chaos have been proposed in order to hide the information signal: additive masking [3], chaos shift keying [4], two channels transmission [5], parametric modulation [6]and inclusion encryption [7] [8].…”

Indirect coupled oscillators for keystream generation in secure chaotic communication

“…This can be done by using any techniques existing in the literature [3,4,7,8]. The signals and are used to generate an estimate of the encrypted signal .…”

Observer-based secure communication using indirect coupled synchronization

“…In recent years, there has been a growing interest in the derivation of secure communication schemes using chaotic oscillators [1][2][3][4][5][6]. In effect, various chaotic synchronization methods have been proposed [3-5, 7, 8] together with a number of modulation methods for chaotic communication systems such as chaotic masking [1,5], parameter modulation techniques [5], chaotic shift keying [2,5], just to mention a few.…”