Abstract
This paper introduces a method of making a simple and effective chaotic system by using a difference of the output sequences of two same existing one-dimension (1D) chaotic maps. Simulations and performance evaluations show that the proposed system is able to produce a one-dimension (1D) chaotic system with better chaotic performances and larger chaotic ranges compared with the previous chaotic maps. To investigate its applications in image encryption, a novel encryption system of linear-nonlinear-linear structure based on total shuffling is proposed. The experiment demonstrated the accuracy of the encryption algorithm. Experiments and security analysis prove that the algorithm has an excellent performance in image encryption and various attacks.
1. Introduction
Nowadays information security is a vital problem in information communication. With the advancements of information technology, lots of digital contents are being stored and transmitted in various forms. As a result, the protection of digital contents data against irregular phenomena, such as illegal copying, and guarantee of their secure utility has become an important issue. In particular, compared to text data, some intrinsic features of image data, such as big size, high redundancy of data and strong correlation among neighbouring pixels are different with ordinary information. Furthermore, image data requires the strong real-time property in communication, therefore, an encryption method with fast speed and high security is needed. But the traditional block encryption being widely used now is found to be inefficient for real-time communication[1].
6. Conclusion
In this paper, firstly, we proposed a method of making a simple and effective chaotic system by using a difference of the output sequences of two same existing one-dimension (1D) chaotic maps. Simulations and performance evaluations showed that the proposed system is able to produce a one-dimension (1D) chaotic system with better chaotic performances and larger chaotic ranges compared with the previous chaotic maps. Secondly, we proposed a novel encryption system of linear-nonlinear-linear structure based on total shuffling to confirm its applications in image encryption. Experiments and security analysis proved that the algorithm has an excellent performance in image encryption and various attacks.
