Chaotic mapping has been widely used in cryptography for its dynamic nature, but it has some unsuitable security characteristics due to its limited precision. Therefore, improving the characteristics of chaotic mapping is essential for improving chaos-based encryption algorithms.
Choe Song Bom, a researcher at the Faculty of Information Science and Technology, has presented a plan to improve one-dimensional logistic mapping by parameter variation with delay coupling method and feedback control, proposed a new two-dimensional chaotic mapping, and further enhanced its randomness by selectively shifting the position of generated chaotic sequences. In addition, he has proposed a new image encryption algorithm based on the improved chaotic mapping.
The results of various simulation experiments showed that the proposed image encryption algorithm provides high-level security and is superior to the previous chaos-based encryption algorithms.