Apparatus for decoding and encoding a digital signal using method for synchronizing a chaostic system by adding noise or chaos signal to variables

摘要

In an apparatus for encrypting and decrypting a digital signal using a chaotic system synchronization method by feeding back a noise or chaos signal to a variable, the encryption apparatus mainly uses a chaos signal to provide noise signals in which variables according to a predetermined chaos system are functionally connected to each other. When at least one chaotic signal is generated by feeding back a variable or coefficient of the device, the generated chaotic signal is converted into an integer bit signal, inverted and transposed of the converted chaotic signal, and then converted into an ASCII code. Encrypts the information signal (s _n ) by using, and synthesizes and transmits the encrypted signal and the noise signal (random number) provided, the decryption apparatus separates the encrypted signal and the noise signal from the signal transmitted from the encryption device, Using the separated noise signal generates a chaotic signal synchronized with the encryption device, the generated chaotic signal Equal to an integer transform and the encryption device, and the pre-inversion, is to decode the separated coded signal with the logical operation by pure information signal is converted into ASCII code.