A Novel and Secure 3D Colour Medical Image Encryption Technique Using 3D Hyperchaotic Map, S-box and Discrete Wavelet...

Area of Science:

• Computer Science
• Information Security
• Medical Imaging

Background:

• The Internet of Medical Things (IoMT) has grown significantly, increasing the need for secure patient data handling in smart healthcare.
• Existing encryption algorithms for medical images are vulnerable to sophisticated attacks like brute force and differential cryptanalysis.

Purpose of the Study:

• To propose an efficient and secure approach for transmitting medical images.
• To enhance the security of medical image data against cyber threats.

Main Methods:

• Utilized a 3D hyperchaotic system for generating chaotic sequences for permutation and diffusion.
• Applied a substitution box (S Box) to increase data redundancy.
• Employed discrete wavelet transform (DWT) to convert the encrypted image into a visually meaningful format.

Main Results:

• The proposed encryption model transforms ciphertext into a visually meaningful image, enhancing security.
• Achieved high security performance metrics: Unified Average Changing Intensity (UACI) of 36.17% and Number of Pixels Change Rate (NPCR) of 99.57%.

Conclusions:

• The developed encryption method provides a secure and robust solution for medical image transmission.
• The visually meaningful ciphertext improves resistance to cyberattacks, ensuring data integrity and confidentiality.