5G通信背景下物理层安全技术研究

Research on Physical Layer Security Technology in 5G

5G通信技术的迅速发展给通信安全提出了更高的要求,作为无线安全的颠覆性革命技术,物理层安全(Physical Layer Security,PLS)技术是实现安全与通信一体化的关键手段。物理层安全技术的本质是利用无线信道特性的内生安全机制,为“一次一密”提供一种可行思路。首先,对通信系统的各协议层以及不同协议层存在的安全威胁和漏洞进行了简单介绍;接着,针对物理层存在的安全问题,对目前所使用的物理层安全研究方向进行了总结和描述;最后,基于物理层密钥生成技术和物理层加密技术,提出了可采用的安全方案,着重介绍了基于调制的物理层加密技术和基于编码的物理层加密技术,从而保证系统的安全性能。

More security requirements in communication are put forward with rapid development of 5G communication.As a revolutionary technology of wireless security,physical layer security(PLS)technology is a key approach to realize the integration of security and communication.The essence of PLS technology is to provide a feasible idea for“one time one secret”by utilizing the endogenous security mechanism of wireless channel characteristics.Firstly,the security threats and vulnerabilities of each protocol layer and different protocol layer in communication system are briefly introduced.Then,in view of the security problems existing in the physical layer,current research direction of physical layer security is described and summarized.Finally,based on the physical layer key generation technology and the physical layer encryption technology,the security scheme that can be adopted is proposed,and the modulation based physical layer encryption technology and encoding based physical layer encryption technology that can be adopted are emphatically introduced,so as to ensure the security performance of the system.