基于混沌的话音保密单元的设计

在DSP(Digital Signal Processor)平台上构建了基于混沌的嵌入式语音保密单元。通过分析Logistic混沌映射的特点,给出了基于对Logistic混沌映射变量和参数同步扰动的新的混沌序列的产生方法。提出了使用该混沌序列的流密码加密方案并以DSP为硬件平台,采用模块化设计,通过基本电路和扩展电路并辅以相应的软件设计实现话音保密通信功能,设计了标准串行接口使之可同多种语音通信终端连接,具有很高的安全性和广泛的实用性。

Design of Voice Security Unit Based on Chaos

A voice chaotic secure communication is built up on DSP platform. Firstly this paper studies the logistic chaotic sequence. Then it brings forward a new chaotic sequence based on synthesized perturbation motion for logistic chaotic mapping variable and parameter, designs a encryption method based on the sequences and an embedded module devising plan of voice security unit based on DSP fiat with a combining plan of software and hardware and realizes voice security communication. The unit also is designed with a standard interface to connect diversified voice terminals, which make the unit have higher security and wider practicability.