Chaos-based Cryptography: a Promising Technology

Journée GDR ISIS "Traitement et communication des images médicales" Université d’Evry Val d’Essonne, 23 mars 2017Security 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, we present two strong chaos-based cryptosystems: a stream cipher and block cipher. These chaos- cryptosystems are recently published