An algorithm based on 6D fractional order hyperchaotic system and knight tour algorithm to encrypt image

• Published in: Physica scripta 2024-05, Vol.99 (5), p.55205
• Main Authors: He, Chenchen, Chen, Zhong, Wang, Lujie, Wu, Ximei, Liu, Tongzhe, Long, Bofeng
• Format: Article
• Language: English
• Subjects: fractional order; hyperchaotic system; image encryption; knight tour algorithm
• ISSN: 0031-8949; 1402-4896
• DOI: 10.1088/1402-4896/ad3409

The security guarantee of data transmission is becoming more crucial as the frequency of information interchange rises. Ensuring the security of images is essential since they serve as a vital transmission medium. This research suggests an image encryption method that combines the knight tour algorithm with a 6D fractional order hyperchaotic system. First, chaotic sequences are produced using a fractional order hyperchaotic system, which is then utilized to index order and jumble the entire image. To retrieve the image after the second scrambling, choose the knight tour beginning point and run ten rounds of knight tour algorithms on the scrambled image. Thirdly, to maximize the efficiency of picture encryption, employ diffusion methods. The outcomes of the imaging experiment were lastly tested and assessed. The security of the image can be successfully guaranteed by a high-dimensional fractional order hyperchaotic system. This is because its high dimensionality gives it a larger key space than the low dimensional system. This is why it can resist attacks more effectively. After a series of evaluation experiments, it is obvious that this encryption scheme has good encryption performance.