Abstract
The pseudo random property of chaotic sequences is very useful in the field of information security, based on the idea of orbit hopping, a chaotic image encryption algorithm with a key mixing proportion factor is proposed. In the proposed algorithm the position scrambling matrix and the value scrambling matrix are generated by the improved chaotic logistic sequences. A key mixing proportion factor (KMPF) is generated based on the plaintext information. By adding this factor, most of cipher text elements value can be changed by the change of any plaintext element. The Security of the proposed algorithm is improved with this factor, and the ability of the proposed algorithm resisting plaintext attacks is strengthened obviously, and the encryption algorithm can resist the statistical and differential attacks effectively, moreover, the algorithm has a large key space and high encryption speed. The effectiveness of the proposed algorithm is verified by the theoretical analysis and numerical simulations.
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