Enhanced Digital Image Encryption Using Sine Transformed Complex Chaotic Sequence

In order to increase the chaotic behaviour of the equation and to get better results than existing encryption methods, we have found a new chaotic equation, namely STLS. The chaotic map generated from STLS (as shown in Fig. 1) manifests convoluted behaviour in the entire range of parameters, and their output states scattered randomly and completely over the entire 2-D plane, which points out that they have an enhanced hyper-chaotic behaviour and shows highly random behaviour. For increasing the key space, our proposed encryption scheme uses effective scrambling and diffusion. Also, simulation results such as average entropy of encrypted image (7.9993) and NBCR (0.50005) show that our proposed algorithm is reliable and provides a high level of security.

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