一种基于STM32的FSO双层加密的通信方案设计  

Design of FSO Double-layer Encryption Communication Scheme Based on STM32

作　　者：刘侃 孔令超 侯奋飞 LIU Kan;KONG Lingchao;HOU Fenfei(Nanjing Normal University,Nanjing 210023,China)

机构地区：[1]南京师范大学,江苏南京210023

出　　处：《现代信息科技》2024年第18期6-9,15,共5页Modern Information Technology

摘　　要：使用STM32芯片、激光发射器和光电二极管构建自由空间光通信系统,目的在于提出一种可靠的通信方案,应对光信号被截取的安全隐患。该方案采用双层加密策略,结合国产加密算法SM4和OCDMA技术,对数据进行加密和编码,以实现数据的安全传输和信道的多用户复用。研究方法利用STM32芯片对数据进行加密传输,采用时间分集技术来降低系统的误码率。所构建的光通信系统实现了信号的加密传输。该双层加密方案能有效抵御光信号窃听和信息泄露的风险,增强系统的安全性。时间分集技术显著降低了大气衰减对通信系统性能的影响,改善系统的通信质量。提出的双层加密方案为解决光通信安全和可靠性问题提供了一种有效的解决方案。This paper uses STM32 chip and laser emitter and photodiode to build a free space optical communications system(FSOCS),and the aim is to propose a reliable communication scheme to address the security risks of optical signal interception.This scheme adopts a double-layer encryption strategy,and combines encryption algorithm SM4 and OCDMA technology to encrypt and encode data,so as to achieve secure transmission of data and multi-user multiplexing of channels.The research method uses STM32 chip to encrypt and transmit data and uses time-division multiplexing technology to reduce the system's bit error rate.The constructed optical communication system achieves encrypted signal transmission.This dual-layer encryption scheme effectively mitigates the risks of optical signal eavesdropping and information leakage,and enhances system security.Time-division multiplexing technology significantly reduces the impact of atmospheric attenuation on communication system performance,and improves communication quality of system.The proposed dual-layer encryption scheme provides an effective solution for addressing the security and reliability issues of optical communication.

关 键 词：FSO 光码分多址 加密 

分 类 号：TN929.12[电子电信—通信与信息系统]