Chaotic secure communication in multiple access environment using iterated maps

2020 ◽  
Author(s):  
H. Soumya Babu ◽  
K. Gopakumar
Keyword(s):  
Secure Communication ◽  
Multiple Access ◽  
Iterated Maps ◽  
Chaotic Secure Communication

A Parameter Modulation Chaotic Secure Communication Scheme with Channel Noises

2011 ◽  
Vol 28 (2) ◽  
pp. 020505 ◽  
Author(s):  
Ying-Qian Zhang ◽  
Xing-Yuan Wang
Keyword(s):  
Secure Communication ◽  
Parameter Modulation ◽  
Communication Scheme ◽  
Chaotic Secure Communication

scholarly journals Robust Secure Beamforming Design for Cooperative Cognitive Radio Nonorthogonal Multiple Access Networks

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Quanzhong Li ◽  
Sai Zhao
Keyword(s):  
Cognitive Radio ◽  
Secure Communication ◽  
Multiple Access ◽  
Spectrum Efficiency ◽  
Maximization Problem ◽  
Artificial Noise ◽  
Practical Case ◽  
Secrecy Rate ◽  
Worst Case ◽  
Rank One

By the integration of cooperative cognitive radio (CR) and nonorthogonal multiple access (NOMA), cooperative CR NOMA networks can improve the spectrum efficiency of wireless networks significantly. Due to the openness and exposure of wireless signals, secure communication is an important issue for cooperative CR NOMA networks. In this paper, we investigate the physical layer security design for cooperative CR NOMA networks. Our objective is to achieve maximum secrecy rate of the secondary user by designing optimal beamformers and artificial noise covariance matrix at the multiantenna secondary transmitter under the quality-of-service at the primary user and the transmit power constraint at the secondary transmitter. We consider the practical case that the channel state information (CSI) of the eavesdropper is imperfect, and we model the imperfect CSI by the worst-case model. We show that the robust secrecy rate maximization problem can be transformed to a series of semidefinite programmings based on S-procedure and rank-one relaxation. We also propose an effective method to recover the optimal rank-one solution. Simulations are provided to show the effectiveness of our proposed robust secure algorithm with comparison to the nonrobust secure design and traditional orthogonal multiple access schemes.

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.

Design and performance analysis of a novel secure communication system based on optical code division multiple access technology

2020 ◽  
Vol 58 ◽  
pp. 102254
Author(s):  
Yeteng Tan ◽  
Tao Pu ◽  
Hua Zhou ◽  
Jilin Zheng ◽  
Guorui Su ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Communication System ◽  
Secure Communication ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Access Technology ◽  
And Performance ◽  
Code Division Multiple

Design and Virtex-7-Based Implementation of Video Chaotic Secure Communications

2020 ◽  
Vol 30 (05) ◽  
pp. 2050075
Author(s):  
Baoju Chen ◽  
Simin Yu ◽  
Ping Chen ◽  
Liangshan Xiao ◽  
Jinhu Lü
Keyword(s):  
Secure Communication ◽  
Stream Cipher ◽  
Divide And Conquer ◽  
Secure Communications ◽  
Fixed Point Algorithm ◽  
Encryption And Decryption ◽  
Communication Scheme ◽  
Ip Cores ◽  
Core Integration ◽  
Chaotic Secure Communication

In this paper, a Virtex-7-based video chaotic secure communication scheme is investigated. First, the network sending and receiving controller Intellectual Property (IP) cores are designed. Next, the chaotic encryption and decryption IP cores are implemented using fixed-point algorithm, pipeline operation, and state machine control. Thus, video capturing, video displaying, network sending, network receiving, chaotic encrypting, and chaotic decrypting can be achieved via IP core integration design. An improved 7D chaotic stream cipher algorithm for resisting divide-and-conquer attack is then designed and realized on a Virtex-7 high-end FPGA platform. Hardware experimental results are also given to verify the feasibility of the scheme.

CHAOTIC SECURE COMMUNICATION BASED ON THE CONCEPT OF EQUIVALENT CONTROL

2006 ◽  
Vol 16 (02) ◽  
pp. 419-425 ◽  
Author(s):  
MAO-YIN CHEN ◽  
DONG-HUA ZHOU ◽  
YUN SHANG
Keyword(s):  
Numerical Simulation ◽  
Theoretical Analysis ◽  
Secure Communication ◽  
Sliding Mode ◽  
Higher Order ◽  
Order System ◽  
Augmented System ◽  
Response System ◽  
Equivalent Control ◽  
Chaotic Secure Communication

This Letter considers the problem of chaotic secure communication in the drive-response framework. The drive system can be augmented into a higher order system, and then a sliding mode observer based response system can be constructed to synchronize this augmented system. If they satisfy certain conditions, the hidden message can be recovered directly by the concept of equivalent control. Theoretical analysis and numerical simulation verify the effectiveness of the proposed method.

Synchronization of the chaotic secure communication system with output state delay

2009 ◽  
Vol 39 (4) ◽  
pp. 1578-1587 ◽  
Author(s):  
Shih-Kuen Changchien ◽  
Chuan-Kuei Huang ◽  
Hsiau-Hsian Nien ◽  
Hong-Wei Shieh
Keyword(s):  
Communication System ◽  
Secure Communication ◽  
State Delay ◽  
Output State ◽  
Chaotic Secure Communication
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