A novel onedimensional sine powered chaotic map and its application in a new image encryption scheme Abstract   With the rapid growth of data transmission technology, image encryption is becoming a widely discussed topic in the field of information security. In this paper, we introduce a novel onedimensional sine powered chaotic system (1DSP). Evaluation of the proposed chaotic system indicates the existence of chaotic behavior with high sensitivity and randomness. We further present a new image encryption scheme using 1DSP (1DSPIE). The proposed scheme uses the 1DSP for sequence addition to improve its security. Furthermore, rowbyrow and columnbycolumn concepts are used for confusion and diffusion operations. This approach breaks the correlation of adjacent pixels by scrambling pixels out of their original rows and columns and applies bitlevel pixel value manipulation for each row and then each column to spread any change in the plain image throughout the ciphered image. The simulation results of the proposed 1DSPIE indicate an effective encryption and decryption process with good speed. In addition, the security analysis illustrates the ability of 1DSPIE to provide a satisfying level of security in comparison with other image encryption schemes.

A Bijective Image Encryption System Based on Hybrid Chaotic Map Diffusion and DNA Confusion Modern multimedia communications technology requirements have raised security standards, which allows for enormous development in security standards. This article presents an innovative symmetric cryptosystem that depends on the hybrid chaotic Lorenz diffusion stage and DNA confusion stage. It involves two identical encryption and decryption algorithms, which simplifies the implementation of transmitting and receiving schemes of images securely as a bijective system. Both schemes utilize two distinctive nonconsecutive chaotic diffusion stages and one DNA scrambling stage in between. The generation of the coded secret bit stream employs a hybrid chaotic system, which is employed to encrypt or decrypt the transmitted image and is utilized in the diffusion process to dissipate the redundancy in the original transmitted image statistics. The transmitted image is divided into eight scrambled matrices according to the position of the pixel in every splitting matrix. Each binary matrix is converted using a different conversion rule in the Watsonxe2x80x93Crick rules. The DNA confusion stage is applied to increase the complexity of the correlation between the transmitted image and the utilized key. These stages allow the proposed image encryption scheme to be more robust against chosenknown plaintext attacks, differential attacks, cipher image attacks, and information entropy. The system was revealed to be more sensitive against minimal change in the generated secret key. The analysis proves that the system has superior statistical properties, bulkier key space, better plain text sensitivity, and improved key sensitivity compared with former schemes.