基于FPGA和PSoC的混沌音频加解密系统

Chaos encryption system for audio based on FPGA and PSoC

针对软件加解密易被攻击、硬件加解密开发难度大的问题,提出了一种基于FPGA和PSoC的混沌保密通信的硬件实现方案。该方案采用线性反馈移位寄存器(LFSR)产生混沌伪随机序列,利用PSoC完成模/数、数/模转换,并采用FPGA实现了混沌伪随机序列产生、同步控制及音频信号加解密等功能。介绍了混沌伪随机序列的产生方法和加解密原理,并给出了系统设计思想和实现方案。测试证明,该系统实现了混沌音频加解密功能,对混沌保密通信领域的应用开发具有一定的参考价值。

Aiming at problems of vulnerability of software encryption and difficult development of hardware encryption, a hardware implementation scheme about chaotic secure communication is presented in this paper, which is based on FPGA and PSoC. The scheme uses linear feedback shift register （LFSR） to generate chaos pseudo-random sequence and takes PSoC to finish A/D and D/A transformation. The scheme realizes the functions of chaos pseudo-random sequence generation,synchronous control,audio encryption and decryption through FPGA. The way to generate chaos pseudo-random sequence and the principle of encryption and decryption are introduced. And the system design method and implementation program are presented. The experimental results indicate that the system realizes the function of encryption and decryption for audio by chaos. The scheme has a certain reference value for application and development in the field of chaotic secure communication.