An Efficient Diffusion Scheme for Chaos-Based Digital Image Encryption

Figure 7

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

(a)

(b)

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(e)

(f)