Entropy-Based Block Scrambling Image Encryption Using DES Structure and Chaotic Systems

Figure 9

Correlations of adjacent pixels: (a) horizontal, (b) vertical, and (c) diagonal correlations of original image; (d) horizontal, (e) vertical, and (f) diagonal correlations of decrypted image.

(a)

(b)

(c)

(d)

(e)

(f)