非预知物理层密钥的无线网络抗敌意干扰技术研究

项目名称： 非预知物理层密钥的无线网络抗敌意干扰技术研究

项目编号： No.61271242

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 肖亮

作者单位： 厦门大学

项目金额： 75万元

中文摘要： 敌意干扰阻塞当前正常通信，可引发拒绝服务攻击，严重威胁无线网络安全。它实施难度低，且无法通过认证和加密等高层安全机制解决。传统抗敌意干扰方案基于扩频技术，要求接收机预知物理层密钥，因而可造成严重的安全隐患。随着无线网络和物联网的发展，以及干扰力强大的智能干扰机的出现，敌意干扰的影响范围和危害日益扩大，因此有关无线抗敌意干扰研究刻不容缓。本研究内容包括：基于非协调扩频技术，优化设计非预知物理层密钥的点对点通信和广播通信的抗干扰技术，进而提出通用的协作型无线网络抗敌意干扰技术方案；研究无线衰落和网络同步误差等因素的影响，并提出对策；在USRP设备上实现该方案，搭建无线抗干扰实验平台；采用理论分析、仿真和现场实测等方法，全面评估其抵御各类干扰机的性能。课题将有助于增强无线局域网和传感网等无线网络抵御敌意干扰的性能，提高其安全性，特别对防恐、维稳和公安应急通信等安全敏感型业务意义重大。

中文关键词： 扩频技术；敌意干扰；物理层安全；智能干扰；

英文摘要： Jamming attacks aim at disrupting the ongoing legitimate communications and can lead to Denial of Service (DoS) attacks, throwing serious threats to wireless networks. Jamming cannot be addressed by the higher-layer security techniques such as authentication and encryption. Based on the spread-spectrum techniques, such as direct sequence spread spectrum and frequency hopping, the traditional anti-jamming techniques require the pre-shared PHY-layer keys at the receivers. The PHY-layer key is the spreading pattern of the transmission, such as frequency hopping pattern and spreading sequence. The requirement on the pre-shared keys makes wireless networks vulnerable to smart jammers with strong jamming strength. As the impacts of jamming attacks increase with the development of wireless networks and Internet of Things, it is critical to investigate the anti-jamming techniques in wireless networks. Therefore, in this project, we will first develop the anti-jamming pair-wise communication strategy based on uncoordinated spread-spectrum techniques, and investigate the anti-jamming broadcast strategy with node cooperations. Then we will propose an anti-jamming scheme for wireless networks, removing the dependency on pre-shared keys. In addition, we will also explore the impacts of channel fading and node synchronizatio

英文关键词： spread-spectrum techniques；jamming；PHY-layer security；smart jammers；