Table 7 Entropy comparison.

From: An image encryption scheme using 4-D chaotic system and cellular automaton

Image

Algorithm

Entropy

Lena

Proposed

7.9977

Lena

Norouzi et al.7

7.9976

Lena

Malik et al.11

7.9971

Lena

Jnana Ramakrishna et al.23

7.9987

Lena

Hu et al.27

7.9975

Lena

Norouzi and Mirzakuchaki29

7.9980

Lena

Benaissi62

7.9977