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

Figure 4

Histograms of original and encrypted images.

(a) Original image: Lena

(b) Encrypted image: Lena

(c) Original image: Black

(d) Encrypted image: Black

(e) Original image: Baboon

(f) Encrypted image: Baboon

(g) Original image: Checkerboard

(h) Encrypted image: Checkerboard