Abstract
This paper proposes a finite time chaos synchronization approach for the secure communication of satellite imaging. To this end, chaotic oscillators are considered in both the transmitter and receiver ends to generate the chaotic encryption/decryption keys. To mitigate the non-negligible channel time-delay between the receiver and transmitter, we propose a robust controller design. The proposed approach is designed based on the Lyapunov stability theory and the finite-time synchronization concept to attain finite time synchronization in a time-delayed channel. By using synchronized chaotic keys, a physical-layer chaotic encryption scheme for transmitting the satellite images is designed in orthogonal frequency-division multiplexing wireless network. The proposed chaotic-based satellite image encryption/decryption system is validated using a numerical simulation study. Additionally, to analyse the robustness and demonstrate the efficiency of the proposed chaotic encryption structure, a set of security analysis tools such as histogram analysis, key space analysis, correlation test, information entropy and other statistical analysis were performed.
Highlights
Over the past few decades we have witnessed a wide growth in information communication technology and its application in space sciences
Vaseghi et al.: Finite Time Chaos Synchronization in Time-Delay Channel and Its Application to Satellite Image Encryption and implementation such as wireless communication, due to the low speed of encryption and decryption, these drawbacks may result in considerable latency [7]
The results indicate that our scheme can resist cutting and noise pollution attacks. This is due to the fact that in the proposed method, the encryption process is done on the Quadratic Amplitude Modulation (QAM) symbols and the receiver can retrieve the original values of the QAM symbols by estimation methods such as optimum receiver
Summary
Over the past few decades we have witnessed a wide growth in information communication technology and its application in space sciences. B. Vaseghi et al.: Finite Time Chaos Synchronization in Time-Delay Channel and Its Application to Satellite Image Encryption and implementation such as wireless communication, due to the low speed of encryption and decryption, these drawbacks may result in considerable latency [7]. Vaseghi et al.: Finite Time Chaos Synchronization in Time-Delay Channel and Its Application to Satellite Image Encryption and implementation such as wireless communication, due to the low speed of encryption and decryption, these drawbacks may result in considerable latency [7] In this regard, cryptography using chaotic signals is a promising techniques which offers a good combination of security, speed and capability [8]. Based on the above discussion, we propose in this paper a chaos synchronization approach for the secure and reliable communication of satellite imaging.
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