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Medical Images Encryption Based on Adaptive-Robust Multi-Mode Synchronization of Chen Hyper-Chaotic Systems.

Ali Akbar Kekha Javan1, Mahboobeh Jafari2, Afshin Shoeibi3

  • 1Faculty of Electrical Engineering, Zabol Branch, Islamic Azad University, Zabol 1939598616, Iran.

Sensors (Basel, Switzerland)
|July 2, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a new medical image encryption method using synchronized hyper-chaotic systems. The novel technique ensures secure communication for telemedicine by effectively encrypting medical images.

Keywords:
adaptive controlencryptionlyapunov stabilitymedical imagesmulti-mode synchronizationrobust controltime varying

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Area of Science:

  • Cybersecurity
  • Applied Mathematics
  • Medical Imaging

Background:

  • Secure communication is vital for telemedicine, requiring robust encryption methods.
  • Hyper-chaotic systems offer complex dynamics suitable for encryption.
  • Multi-mode synchronization of chaotic systems is challenging due to uncertainty and disturbances.

Purpose of the Study:

  • To present a novel medical image encryption method based on multi-mode synchronization of hyper-chaotic systems.
  • To design an adaptive-robust controller for synchronized chaotic systems with uncertain parameters and disturbances.
  • To demonstrate the effectiveness of the proposed method for secure medical image transmission in telemedicine.

Main Methods:

  • Design of an adaptive-robust controller for multi-mode synchronized chaotic systems with variable and unknown parameters.
  • Utilizing Lyapunov's method to prove the convergence of synchronization and parameter estimation errors.
  • Development of new update laws for time-varying parameters and estimation of disturbance/uncertainty bounds.
  • Equivalence proof for two distinct multi-mode synchronization configurations (main-response and circular).

Main Results:

  • Convergence of synchronization error and parameter estimation error to zero was achieved.
  • The proposed controller guarantees system stability under bounded disturbances and uncertainties.
  • Statistical analyses confirmed the effective performance of the encryption method on medical and benchmark images.

Conclusions:

  • The presented multi-mode synchronization method provides a secure and effective approach for medical image encryption.
  • The adaptive-robust controller successfully handles system uncertainties and disturbances.
  • The technique is well-suited for enhancing the security of medical data in telemedicine applications.