Encryption of Medical Image Based on Cascaded Design of AES Block Algorithm and Chaotic Map
Gaidaa S. Mahdi
University of Technology-Iraq, Chemical Engineering Department, Baghdad, Iraq
Marwa Fadhel Jassim
University of Technology-Iraq, Control and Systems Engineering Department, Baghdad, Iraq
Mustafa Q. Ali
University of Baghdad, College of Islamic Sciences Baghdad, Iraq
1-12
Vol: 14, Issue: 3, 2024
Receiving Date:
2024-04-26
Acceptance Date:
2024-08-01
Publication Date:
2024-08-12
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http://doi.org/10.37648/ijrst.v14i03.001
Abstract
Security concerns in the transfer of medical images have drawn a lot of attention to the topic of medical picture encryption as of late. Furthermore, recent events have brought attention to the fact that medical photographs are constantly being produced and circulated online, necessitating safeguards against their inappropriate use. To improve the design of the AES algorithm standard for medical picture encryption, this research presents several new criteria. It was created so that needs for higher levels of safety and higher levels of performance could be met. First, the pixels in the image are diffused to randomly mix them up and disperse them all over the screen. Rather than using rounds, the suggested technique utilizes a cascaded-looking composition of F-functions in a quadrate architecture. The proposed F-function architecture is a three-input, three-output Type-3 AES-Feistel network with additional integer parameters representing the subkeys in use. The suggested system makes use of the AES block cipher as a function on a Type-3 AES-Feistel network. Blocks in the proposed system are 896 bits in length, whereas keys are 128 bits. The production of subkeys is encrypted using a chain of E8- algorithms. The necessary subkeys are then generated with a recursion. The results are reviewed to verify that the new layout improves the security of the AES block cipher when used to encrypt medical images in a computer system.
Keywords:
Cryptography; Block Cipher; AES; Medical image; Chaotic map, Image Encryption
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