Real-time video security system using chaos- improved advanced encryption standard (IAES)

• Published in: Multimedia tools and applications Vol. 81; no. 2; pp. 2275 - 2298
• Main Authors: Hafsa, Amal, Fradi, Marwa, Sghaier, Anissa, Malek, Jihene, Machhout, Mohsen
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.01.2022; Springer Nature B.V
• Subjects: Algorithms; Complexity; Computer Communication Networks; Computer Science; Cryptography; Data Structures and Information Theory; Encryption; Initial conditions; Multimedia; Multimedia Information Systems; Real time; Security systems; Special Purpose and Application-Based Systems; Video transmission; IAES; Security; Real time; Chaos theory; Video encryption
• ISSN: 1380-7501; 1573-7721
• DOI: 10.1007/s11042-021-11668-4

Real-time multimedia applications are increasingly achieving success in the everyday world. Thereby, multimedia information relies on security to protect private life. The Advanced Encryption Standard (AES) has been designed to secure different applications. Yet, some limitations are given, making it inappropriate for secure video storation and transmission. The limitations are the time complexity, the multiple iterations, and the predefined substitution box. Thus, any user can use it to break the encryption. Moreover, the multiple iterations augment the need for CPU usage, and so the overall run time. Hence, it is necessary to modify the AES algorithm to make it more appropriate for securing video frames transmission over insecure channel. In this paper, an Improved AES (IAES) is put forward, which improves both diffusion and confusion in ciphered video. Our work consists in the following two main points: First, we propose to eliminate both shift-row and sub-byte transformations and replace them with a mix-row operation. This task reduces the run time, which presents a significant factor for real-time video transmission. Equally important, we propose to use the henon chaotic map in the key generation procedure, which provides more randomness. The Hash Algorithm SHA-3 is used to generate the initial conditions of the chaotic attractor. The video encryption procedure is verified with success, and the experimental results confirm that the novel algorithm combining chaos and IAES augments the entropy of the ciphered video by 15% and reduces the complexity time for both encryption and decryption compared to the standard one. Security analysis is successfully performed, and the results prove that our suggested technique provides the basics of cryptography with more correctness. The PRNG is tested by NIST 800–22 test suit, which indicates that it is suitable for secure image encryption. It provides a large key space of 2 128 which resists the brute-force attack. All in all, the findings confirm that the novel security approach eliminates the limitation of the existing AES and provides a trade-off between speed and safety levels to secure video transmission.