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In this Letter, we firstly construct an n-dimensional chaotic dynamic system named feedforward–feedback nonlinear filter (FFNF), and then propose a novel chaotic keyed hash algorithm using FFNF. In hashing process, the original message is modulated into FFNF's chaotic trajectory by chaotic shift keying (CSK) mode, and the final hash value is obtained by the coarse-graining quantization of chaotic...
This Letter proposes a chaotic secure communication scheme based on nonlinear autoregressive digital filter with changeable parameters, where the nonlinear filter is employed to serve as a high-ordered chaotic dynamic system, the plaintext to be transmitted is modulated into the chaotic signal by chaos shift keying (CSK) approach, and a noncoherent detection with maximum likelihood (ML) method is...
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