الفهرس 
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Abstract
Chaotic dynamical systems or simply “chaotic maps” have drawn the attention of
cryptographers toward building a new generation of multimedia cryptosystems (image,
audio or video protection schemes). Chaotic maps have the desired properties
unpredictability, ergodicity, and sensitivity to their parameter(s) and initial value(s) that
full the requirements of cryptosystem confusion-diffusion properties.
Chaotic maps structures are simple and their hardware implementations are relatively
easy and have low cost. However, some of chaotic maps were proved to be insecure due
to some drawbacks in their behavior. Thus, enhancing chaotic systems with excellent
chaotic behavior and good performance becomes significative.
Very recently, quantum chaotic systems answer the question of how chaotic systems
can be described in terms of quantum theory. It emerges a new branch of physics from
the efforts to understand the features of quantum systems which have chaotic
deterministic dynamics in the classical limit. One of the aims of quantum chaos is the
study of quantum versions of classical chaotic systems. Quantum chaos can be
characterized by the sensitivity to parameters in the Hamiltonian space that governs the
chaotic dynamics. This interesting property can be used in designing cryptosystems.
This dissertation adopts new combinations of chaotic systems, namely one way
coupled map lattice, multiple one dimensional chaotic systems, quantum chaotic
system, and Chen’s chaotic system combined with choquet fuzzy integral, and utilized
them to design new image encryption schemes.
In view of this, designing new secure and fast security algorithms based on the new
chaotic systems that protect the confidentiality, achieving authentication and access
control is essential for image encryption applications.
This research involves the following aspects of chaos based image cryptosystem:
block cipher, stream cipher, selective encryption and steganography. The proposed
schemes have been evaluated in terms of safety and performance by measuring the
subjective and objective metrics. They showed good performance and security.