A Chaotic Encryption Method for Speech Information
A technology of chaotic encryption and voice information, applied in the direction of secure communication through chaotic signals, secure communication devices, digital transmission systems, etc., can solve problems such as limited calculation accuracy, chaotic system performance impact, chaotic sequence short period, etc., and achieve the required resources less, weaken the effect of effective precision, and enhance the effect of encryption security
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[0027] The present invention will be further described below through specific embodiments.
[0028] A chaotic encryption method for voice information, comprising the steps of:
[0029] 1) Construct a dynamic variable parameter compound chaotic system, which is formed by cascading Logistic mapping and Hénon mapping, and use this system to generate a real-valued chaotic sequence with the same length as the plaintext speech sequence. The Logistic map is a classic one-dimensional chaotic map. When the bifurcation parameter 3.57<μ≤4, the system enters a chaotic state. The Hénon map is a two-dimensional discrete chaotic map. When 0.7≤ɑ≤1.4, the system enters a chaotic state. The Logisitc map and the Hénon map of the chaotic system with dynamic variable parameters can be adjusted in cascading order without affecting the performance of generating chaotic sequences.
[0030] Among them, the dynamic changes of μ and ɑ in the present invention are bifurcation parameters of Logistic map...
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