Exploration of secure image communication via a resistor-two inductors-two diodes chaotic circuit

In this thesis, first a synchronization study has been performed by using a R2L2D circuit including one resistor 2 inductors and 2 diodes and that circuit has been synchronized with the same other chaotic circuit. Then, the images are modulated on a chaotic signal by a signal from an adder circuit via a digital-anolog converter and the summed chaotic and gray-level signal is sent to the receiver circuit for the encyrption of the summed signal in a secure way. As the methods, OGY (Ott-Grebogi-Yorke) and master-slave methods are used for synchronization and secure communication, respectively. In the literature, there exists no secure image communication system by using the present chaotic circuit, encryption and decrytion the images, synchronously. That providing the secure communication theroretically and experimentally by real-time analog circuits is superior over the internet and other computer-based applications, because the data in internet and computer media are open to be copied, there is no such possibility in analog circuits. In the experiments, analog/digital and digital/analog converters are used for the read of gray levels of images and the communication issues, these images can be destroyed just after the transfer at the end of process. The conventional techniques operate with the stored and processed data in the computer media and while that procedure can be a security problem in today's developed internet web media, the proposed synchronized secure image communication technique will fill the gap in that field. Keywords: Secure Image System, R2L2D Choatic Circuit, Image Encryption and Decryption, Synchronization, Master–Slave Chaotic's Circuits