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Abstract
The aim of this study is proposing a novel chaotic system in which the variables of the system are treated as encryption keys to achieve secure transmission of digital images. The proposed system has high sensitivity to the variation of its initial values and parameters producing unpredictable trajectories. The novel system successfully passes the 0-1 test and FIPS PUB 140-1 statistical tests that check the distribution of the distinguished elements by generated chaotic sequences. The results obtained proved the robustness of the image encryption/decryption system based on sequences generated from the proposed chaotic generator.
Highlights
Many scientists and scholars for the last decades try to investigate the issue of data encryption and decryption with different methods and systems to promote communication security
Chaotic systems can be used in two ways in cryptography: -generate pseudo-random sequences, which are used as key streams to mask the plaintext in manifold ways, the plaintext is used as initial state and the cipher text follows from the orbit being generated (Merah et al, 2013)
The results are divided into two parts, first testing the novel CL system presented in section III to verify its chaotic and randomness behavior
Summary
Many scientists and scholars for the last decades try to investigate the issue of data encryption and decryption with different methods and systems to promote communication security. Chaotic systems can be used in two ways in cryptography: -generate pseudo-random sequences, which are used as key streams to mask the plaintext in manifold ways, the plaintext is used as initial state and the cipher text follows from the orbit being generated (Merah et al, 2013). The previous works about proposing hybrid chaotic systems for encryption are few. The reason behind that is having hybrid chaotic system is not a straightforward operation by combining two different types of chaotic systems because the chaotic behavior will be lost unless a careful design is considered. Examples of successful hybrid chaotic systems are those presented by combining LIU and Lu systems (Nien et al, 2007)
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