摘要
系统采用改进的数据加密算法(Data Encryption Algorithm,DEA),由复杂可编程逻辑器件(Complex Programmable Logic Device, CPLD)芯片EPM570构建硬件系统。声波信号经频率调制后,经密钥加密后发送给接收端,接收端先经过滤波,再由密钥解密后还原出原信号,从而实现近距离加密传输。硬件电路分为发送端和接收端两部分,由主控器、CPLD、直接数字式频率合成器(Direct Digital Synthesizer,DDS)、滤波器和里所(Reed-solomon,RS)码模块电路构成。实验表明该系统具有较高的安全性,可应用于机密信号或敏感信号的传输。
The system adopts the improved data encryption algorithm(DEA),and the hardware encryption system is constructed by complex programmable logic device(CPLD)chip EPM570.After frequency modulation,the acoustic signal is encrypted by key and sent to the receiving end.The receiving end is filtered and the original signal is restored after key decryption,so that the close-range encrypted transmission can be realized.The hardware circuit is divided into two parts:the sender and the receiver,which are composed of the main controller,CPLD,direct digital synthesizer(DDS),filter and reed-solomon(RS)codes module circuits.Experi-ments show that the system has high security and can be applied to the transmission of confidential or sensitive signals.
作者
单慧琳
张银胜
Shan Huilin;Zhang Yinsheng(Nanjing University of Information Science&Technology,Nanjing 210044,China)
出处
《电子技术应用》
2019年第4期104-108,共5页
Application of Electronic Technique
基金
国家自然科学面上资助项目(61372128)
江苏省高校自然科学基金项目(16KJB510025)
