An Image Encryption Algorithm Based on Hyperchaotic System and Variable-Step Josephus Problem

Figure 6

The histogram original images and their cipher images. (a) Histogram of the cameraman 256 × 256 image. (b) Histogram of the cipher cameraman 256 × 256 image. (c) Histogram of the brain 256 × 256 image. (d) Histogram of the cipher brain 256 × 256 image.

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