A note on chaotic secure communication systems

2002 ◽  
Vol 49 (1) ◽  
pp. 92-96 ◽  
Author(s):  
Zhong-Ping Jiang
Keyword(s):  
Secure Communication ◽  
Communication Systems ◽  
Chaotic Secure Communication

Encryption of Analog and Digital signals through Synchronized Chaotic Systems

2011 ◽  
pp. 415-438
Author(s):  
Kehui Sun
Keyword(s):  
Secure Communication ◽  
Communication Systems ◽  
Chaotic Sequence ◽  
Digital Signals ◽  
Encryption Schemes ◽  
Shift Keying ◽  
Chaos Shift Keying ◽  
Sequence Generator ◽  
Chaotic Secure Communication ◽  
Spreading Spectrum

Chaos is characterized by aperiodic, wideband, random-like, and ergodicity. Chaotic secure communication has become one of the hot topics in nonlinear dynamics since the early 1990s exploiting the technique of chaos synchronization. As distinguished by the type of information being carried, chaos-based communication systems can be categorized into analogy and digital, including four popular techniques such as Chaos Masking, Chaos Shift Keying, Chaos Modulation, and Chaos Spreading Spectrum. In this chapter, the principles of these schemes and their modifications are analyzed by theoretical analysis as well as dynamic simulation. In addition, chaos-based cryptography is a new approach to encrypt information. After analyzing the performances of chaotic sequence and designing an effective chaotic sequence generator, the authors briefly presented the principle of two classes of chaotic encryption schemes, chaotic sequence encryption and chaotic data stream encryption.

Implementation of chaotic secure communication systems based on OPA circuits

2005 ◽  
Vol 23 (2) ◽  
pp. 589-600 ◽  
Author(s):  
Chuan-Kuei Huang ◽  
Shuh-Chuan Tsay ◽  
Yu-Ren Wu
Keyword(s):  
Secure Communication ◽  
Communication Systems ◽  
Chaotic Secure Communication

Experimental Results of Impulsive Synchronization Between Two Chua's Circuits

1998 ◽  
Vol 08 (03) ◽  
pp. 639-644 ◽  
Author(s):  
Andrey I. Panas ◽  
Tao Yang ◽  
Leon O. Chua
Keyword(s):  
Dynamic Systems ◽  
Spread Spectrum ◽  
Secure Communication ◽  
Communication Systems ◽  
Experimental Results ◽  
Parameter Mismatch ◽  
Driving System ◽  
Impulsive Synchronization ◽  
Driven System ◽  
Chaotic Secure Communication

Impulsive synchronization of chaotic dynamic systems has some important applications to chaotic secure communication and chaotic spread-spectrum communication systems. In this paper we present some experimental results on impulsive synchronization between two Chua's circuits. In our experiments, only one synchronizing impulse sequence is transmitted. The robustness of impulsive synchronization with respect to variations in the frequency and the width of impulses is studied. Experimental results show that robust impulsive synchronization can be achieved under noisy conditions and a 2% parameter mismatch between the driving system and the driven system. We also found that an amplified impulse sequence with a gain greater than unity can make the impulsive synchronization more robust. Moreover, we found that impulsive synchronization can be achieved with very narrow impulses.

EXPANDED LORENZ SYSTEMS AND CHAOTIC SECURE COMMUNICATION SYSTEMS DESIGN

2006 ◽  
Vol 15 (04) ◽  
pp. 607-614 ◽  
Author(s):  
LEONARDO ACHO
Keyword(s):  
Communication System ◽  
Secure Communication ◽  
Communication Systems ◽  
Lorenz System ◽  
Systems Design ◽  
Lyapunov Theory ◽  
Globally Asymptotically Stable ◽  
Space Expansion ◽  
The Lorenz System ◽  
Chaotic Secure Communication

Using Lyapunov theory, the Lorenz chaotic system was partitioned in two parts, where one of them is globally asymptotically stable. This partition facilitated the state–space expansion of the Lorenz system from three to four-order. This new four-order Lorenz system, one of its states is synchronized with other. This expansion allows us to design a secure communication system where the dynamic of the receiver is just one-order. The proposed secure communication system uses two-lines of transmission. Simulation results are included to demonstrate the performance of this secure communication system based on this new four-order Lorenz system.

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