Abstract
Nowadays, chaos-based image encryption is recognized as an effective choice in secure communications. This paper proposes a novel approach, which uses bit-pair level XOR, add, and rotation from top to bottom and enhances diffusion with pixel level XOR operator from the lower right corner to the upper left corner. Due to the bit-pair level encryption, the proposed scheme has ensured great security and high encryption speed. The chaotic series employed for encryption are obtained from the modified pulse-coupled spiking neurons circuit map. It is suitable for use encryption because of its abundant parameters: wide chaotic range, ergodicity, complexity, and high sensitivity. Furthermore, the results show the superiority of this scheme compared to the other four methods in terms of robustness to differential attack.
Highlights
With the rapid development of multimedia technology and the widespread popularity of personal digital device and internet, the protection of images from unauthorized parties is a core issue
A slight change of initial values or control parameters leads to significantly different outputs of chaotic systems and cause totally different key streams, which guarantees the security of cryptosystem
It can be seen that all the root mean square difference (RMSD) are greater than 104, which reveals the huge difference between each pair of ciphers
Summary
With the rapid development of multimedia technology and the widespread popularity of personal digital device and internet, the protection of images from unauthorized parties is a core issue. Ge et al.: Novel Chaos-Based Symmetric Image Encryption Using Bit-Pair Level Process encryption scheme This structure is in good accord with the confusion and diffusion properties of cryptography mentioned by Shannon in [31]. Each pixel value is altered sequentially by the chaotic iterative value and the output of the Logistic map This image encryption scheme reaches a high encryption speed, and needs at least 3 encryption rounds to resist differential attack. A chaos-based symmetric image encryption using bit-pair level process is proposed. 3) SENSITIVITY Chaotic map used in image encryption should be sensitive to the initial value and the control parameters. Rotations and control instructions is able to confuse it efficiently and effectively
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