Chaos-based- Information Hiding and Security: an emergent technology
Résumé
Security and confidentiality of image and video data is an important research topic and have been widely investigated by using standard cryptography and chaos-based cryptography. Indeed, a variety of chaos-based cryptosystems have been investigated during the last decade. Most of them are based on the structure of Fridrich, which is based on the traditional confusion-diffusion architecture proposed by Shannon. Compared with traditional cryptography, the chaos-based cryptography are more flexible which make them more suitable for large scale-data encryption, such as images and video. The heart of any chaos-based cryptosystem is the chaotic generator and so, a part of the efficiency (robustness, speed) of the system depends greatly on it. Furthermore, in stream ciphers all the security depend on the used pseudo-random number generator (PRNG).
In this talk, first, we describe three of our chaos-based cryptosystems: two blocks ciphers and one selective stream cipher for HEVC coder at CABAC level. Then, we describe the structure of the proposed generator of discrete chaotic samples and we compare its performance (robustness, speed) with the traditional pseudo-random number generators used in standard cryptography (eStream).