An Efficient Diffusion Scheme for Chaos-Based Digital Image Encryption

Figure 8

Key sensitivity test (ii) using cat map for permutation: (a) cipher image (𝑥₀=0.3,𝜇=3.999), (b) plain image, (c) decipher image (𝑥₀=0.30000000000001,𝜇=3.999), and (d) decipher image (𝑥₀=0.3,𝜇=3.99900000000001).

(a)

(b)

(c)

(d)