A Secure Image Encryption Algorithm Based on Rubik's Cube Principle

Figure 5

Correlation distribution of the pairs horizontal to adjacent pixels.

(a) Image: Lena

(b) Encrypted image: Lena

(c) Image: Black

(d) Encrypted image: Black

(e) Image: Baboon

(f) Encrypted image: Baboon

(g) Image: Checkerboard

(h) Encrypted image: Checkerboard