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为实现无线信道中的高度保密通信,提出了一种基于DSP平台的多重加密通信系统。加密通信终端以高性能数字信号处理器DSP芯片为核心,融合高级加密算法(AES)、非对称加密算法(RSA)和混沌伪随机序列CPRS(Chaos Pseudo-Random Sequence)三种加密算法,利用电路交换数据业务(CSD)信道进行语音保密通信。文中详细阐述了系统方案的总体框架设计,介绍了系统硬件平台选型及相关硬件和外围接口的设计,并结合系统功能和保密体系,具体描述了系统的软件设计以及总体工作流程。实验结果表明:三层加密算法安全可靠,语音传输延时很小,实现了良好的保密通信目的。
In order to realize highly secure communication in wireless channel, a multi-encryption communication system based on DSP platform is proposed. Encrypted communications terminal to high-performance digital signal processor DSP chip as the core, the integration of advanced encryption algorithm (AES), asymmetric encryption algorithm (RSA) and chaotic pseudorandom sequence CPRS (Chaos Pseudo-Random Sequence) three encryption algorithm, the use of circuits Exchange Data Services (CSD) channels for voice-secured communications. In this paper, the overall framework design of the system scheme is described in detail. The design of the hardware platform and the design of the related hardware and peripheral interfaces are introduced. The software design and the overall workflow of the system are described with the system functions and the security system. The experimental results show that the three-layer encryption algorithm is safe and reliable, and the delay of voice transmission is very small, thus achieving the purpose of good confidential communication.