An Improved Secure Image Encryption Algorithm Based on Rubik's Cube Principle and Digital Chaotic Cipher

Figure 2

Histograms of original, shuffled, and encrypted images. (a) Histogram of original image, (b) histogram of shuffled image, and (c) histogram of encrypted image. (Test conditions: 𝛼=10, 𝛽₁=167, 𝛽₂=202, 𝑟=1.998313787961430, and 𝑥=0.687754925117697.)

(a)

(b)

(c)