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

Figure 5

Correlation distribution of diagonally adjacent pixels. (a) Original image, (b) shuffled image, and (c) encrypted image. (Test conditions: 𝛼=10, 𝛽₁=167, 𝛽₂=202, 𝑟=1.998313787961430, and 𝑥=0.687754925117697.)

(a)

(b)

(c)