A new 3D chaotic cipher for encrypting two data streams simultaneously

A new three-dimensional (3D) discrete chaotic cipher is proposed which is based on the 3D Lorenz chaotic system. Non-autonomous modulation which is used in continuous chaotic cryptographic systems is employed to encrypt two messages simultaneously. Each pair of data values is encrypted twice so that only one state variable need be transmitted. The proposed algorithm has a simple structure and so is suitable for practical applications. The cryptographic properties are analyzed. Results are presented which show that this algorithm provides excellent security and is resistant to existing attacks such as those based on synchronization.

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