Image encryption with dynamic chaotic Look-Up Table
This work addresses image security for applications like secure communication, but it is incremental as it builds on existing chaos-based encryption methods.
The authors tackled image encryption by proposing a scheme based on chaos theory that uses a dynamic chaotic Look-Up Table to cipher each pixel, resulting in an encrypted image that is protected against attacks and shows a low correlation coefficient compared to the plain image.
In this paper we propose a novel image encryption scheme. The proposed method is based on the chaos theory. Our cryptosystem uses the chaos theory to define a dynamic chaotic Look-Up Table (LUT) to compute the new value of the current pixel to cipher. Applying this process on each pixel of the plain image, we generate the encrypted image. The results of different experimental tests, such as Key space analysis, Information Entropy and Histogram analysis, show that the proposed encryption image scheme seems to be protected against various attacks. A comparison between the plain and encrypted image, in terms of correlation coefficient, proves that the plain image is very different from the encrypted one.