A New Chaos-Based Color Image Encryption Scheme with an Efficient Substitution Keystream Generation Strategy

Figure 2

The applications of the proposed and three conventional chaos-based permutation methods. (a) The test image; (b) the test image after applying the proposed permutation method once; (c)–(e), (f)–(h), and (i)–(k) are the test images after applying the cat map, the baker map, and the standard map once, twice, and three times, respectively.