Abstract: A system for hyper-chaos secure communication, for conveying data confidentially from a transmitter to a receiver, includes: (1) a hyper-chaotic signal generator, for carrying a message into a first signal of the hyper-chaotic signal generator; (2) a transmitter's adjusting parameter device, for adjusting a first inner coupling parameter of the hyper-chaotic signal generator, causing the hyper-chaotic signal generator transforming the message and the first signal into a hyper-chaotic message; (3) a hyper-chaotic synchronization receiver, for adjusting a second inner coupling parameter of the hyper-chaotic synchronization receiver via a receiver's adjusting parameter device, causing the hyper-chaotic synchronization receiver generating a second signal to realize simplex-coupling asymptotical synchronization with the first signal after the receiver receiving the hyper-chaotic message; and (4) a recovery device, for obtaining a difference between the hyper-chaotic message and the second signal, inputting the dif

Abstract: A robust hyper-chaotic encryption-decryption system, for digital secure-communication from a transmitter to a receiver, utilizing two robust hyper-chaotic means in the transmitter and receiver respectively, wherein the transmitter includes a hyper-chaotic signal generator and a transmitter's adjusting parameter device, and the receiver includes a hyper-chaotic synchronization receiver and a receiver's adjusting parameter device. A method is also disclosed, comprising an encryption and a decryption process wherein the encryption process including steps of decomposing a plaintext message into a sequence and carrying the sequence into a masking sequence of a hyper-chaotic signal via an XOR operation for generating a hyper-chaotic ciphertext, and the decryption process including steps of generating unmasking sequence of a hyper-chaotic signal to realize synchronization with the masking sequence after receiving the ciphertext and transforming the ciphertext into a decrypted plaintext massage via an XOR operation.

Abstract: A system and a method for handling laser-communication multiplexing in chaotic secure communications are disclosed. The messages to be multiplexed are encoded by chaotic laser signals of a transmitter system. The transmitted signals are then coupled to another chaotic system, the receiver system, so that the receiver and the transmitter are asymptotically synchronized. The decoding of the multiplexed messages encoded by chaotic behaviors is achieved by using a low-pass filter. This low-pass filter can effectively increase the fractal dimension of the chaotic system and enhance the periodicity of the transmitted time sequences, so that the multiplexed messages can be recovered.

Abstract: A system and a method for handling laser-communication multiplexing in chaotic secure communications are disclosed. The messages to be multiplexed are encoded by chaotic laser signals of a transmitter system. The transmitted signals are then coupled to another chaotic system, the receiver system, so that the receiver and the transmitter are asymptotically synchronized. The decoding of the multiplexed messages encoded by chaotic behaviors is achieved by using a low-pass filter. This low-pass filter can effectively increase the fractal dimension of the chaotic system and enhance the periodicity of the transmitted time sequences, so that the multiplexed messages can be recovered.