移动条件下短距离无线通信物理层安全关键技术研究

With the rapid development of short range wireless communication, thousands of mobile applications come out in recent years. Mobile devices are vulnerable during communication with each other. It’s important to establish security channel to ensure confidentiality. Due to the unpredictable environments and the limited resources during wireless communication, the traditional security channel establishment methods are hard to apply such as key exchange protocols and the PKI. Physical Layer Security using wireless signal characters has become a research hotspot. However, the complicated interactive and the high cost when producing the keys are challenged the research on mobile scenario. According to these challenges, we will analyze the repaid feature extraction methods, dynamic signal quantification, and the symmetric characters. Then, the forward error correcting code is used on key generation technology. According to the dynamic cooperative interference technology, the Game Evolution Theory is used. At last, to verify these theoretical achievements, an experiment environment will be established. A whole short range communication physical layer system will be set up during this project. Take advantage of the research results, we Fight for global impact on physical layer security.

随着短距离无线通信技术的快速发展，基于移动设备的网络应用层出不穷。移动设备在通信过程中容易受到非法用户的攻击，建立安全通道保证信息传输的安全性具有重要意义。通信环境难以预测、资源受限等特点，使得传统密钥交换协议、公钥证书等建立安全通道的技术难以适用。利用无线信号特征实现的物理层安全成为近年的研究热点，但在移动环境下仍面临信息调和时间长、密钥生成代价高等问题。针对上述挑战，本课题将深入分析空频域快速信号特征提取、动态量化及信号特征对称性，研究基于前向纠错码的无信息调和密钥生成技术和基于博弈演化的动态协作干扰技术，并搭建实验验证系统对各项关键技术进行测试验证。通过课题研究，拟形成一套完整的短距离无线通信物理层安全技术体系，争取关键研究成果在国际上产生影响力。

随着车联网、可穿戴计算等移动场景的发展，人们对用户数据的隐私性和保密性越来越重视，这对无线通信的安全能力提出了更高要求。利用无线信道的固有特点作为加密密钥源的物理层安全成为研究热点，但在移动场景下的具体应用方式还有待探索。针对上述挑战，本课题在充分吸收和利用现有的信息安全研究成果基础上，以移动场景下无线信号特征提取与分析、节点间时钟同步、密钥提取与协商、密钥交换认证协议、干扰节点选择与干扰模型为研究主线，对移动场景中的物理层安全应用展开研究，分析了无线信号特征在物理层安全中的应用，提成了基于纠错码的密钥生成算法，设计了安全通信协议等，并完成三篇论文、两项专利，后续成果也在陆续发表中，为移动场景下的安全通信提供了新的思路。