A multi-image encryption scheme based on the fractional-order hyperchaotic system is designed in this paper. The chaotic characteristics of this system are analyzed by the phase diagram, Lyapunov exponent and bifurcation diagram. According to the analyses results, an interesting image encryption algorithm is proposed. Multiple grayscale images are fused into a color image using different channels. Then, the color image is scrambled and diffused in order to obtain a more secure cipher image. The pixel confusion operation and diffusion operation are assisted by fractional hyperchaotic system. Experimental simulation and test results indicate that the devised multi-image encryption scheme can effectively encrypt multiple images, which increase the efficiency of image encryption and transmission, and have good security performance.

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The full text of this article is available to read as a PDF.
No competing interests reported.
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Posted 24 May, 2021
On 10 Jun, 2021
Received 02 Jun, 2021
On 27 May, 2021
Invitations sent on 27 May, 2021
On 27 May, 2021
On 21 May, 2021
On 21 May, 2021
On 05 May, 2021
Posted 24 May, 2021
On 10 Jun, 2021
Received 02 Jun, 2021
On 27 May, 2021
Invitations sent on 27 May, 2021
On 27 May, 2021
On 21 May, 2021
On 21 May, 2021
On 05 May, 2021
A multi-image encryption scheme based on the fractional-order hyperchaotic system is designed in this paper. The chaotic characteristics of this system are analyzed by the phase diagram, Lyapunov exponent and bifurcation diagram. According to the analyses results, an interesting image encryption algorithm is proposed. Multiple grayscale images are fused into a color image using different channels. Then, the color image is scrambled and diffused in order to obtain a more secure cipher image. The pixel confusion operation and diffusion operation are assisted by fractional hyperchaotic system. Experimental simulation and test results indicate that the devised multi-image encryption scheme can effectively encrypt multiple images, which increase the efficiency of image encryption and transmission, and have good security performance.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15
The full text of this article is available to read as a PDF.
No competing interests reported.
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