A Simple Image Encryption Based on Binary Image Affine Transformation and Zigzag Process

Figure 6

Histogram analysis plain and cipher images using the secret key «A23C56789ABADEF7167DEAB6789367A9»: (a), (b), (c), and (d) A plain image “Balantidium Coli cyst” and its corresponding histogram, cipher image, and cipher image histogram, respectively. (e), (f), (g), and (h) A plain image “echopelv» and its corresponding histogram, cipher image, and cipher image histogram, respectively. (i), (j), (k), and (l) A plain image “Girl (Lena, 4.2.04)» and its corresponding histogram, cipher image, and cipher image histogram, respectively. (m), (n), (o), and (p) A plain image “Guefack» and its corresponding histogram, cipher image, and cipher image histogram, respectively.

(a)

(b)

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(d)

(e)

(f)

(g)

(h)

(i)

(j)

(k)

(l)

(m)

(n)

(o)

(p)