Output-cryptograph mixed feedback chaos stream cipher encrypting and decrypting method
An output feedback, encryption and decryption technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problems of complex mapping form, affecting the system implementation cost and system speed, etc., to achieve strong flexibility, simple form, and good confidentiality. Effect
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[0026] Such as figure 1 As shown, the specific steps of the encryption process are:
[0027] The internal state x(t) of the key stream generator passes through the chaotic signal generator and generates chaotic signal u(t) after multiple chaotic iterations. The mathematical expression is expressed as:
[0028] u(t)=U(x(t))=F z (x(t));
[0029] The chaotic signal u(t) passes through the separation link and is separated according to the even bits and odd bits to generate the output feedback signal e(t) and the signal o(t) used for key stream generation. The mathematical expression is expressed as:
[0030] e ( t ) = H ( u ( t ) ) = Σ j = 1 r u 2 ...
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