TC: Small: Security Provisioning for Cognitive Radio Networks

基于认知无线电技术的动态频谱接入这一新兴的无线模式因其在大幅提高频谱利用效率方面的巨大潜力而日益受到人们的认可。认知无线网络（crn）的基本要求是保护授权的主用户，并为次认知用户提供可靠的动态频谱接入，这就提出了频谱接入安全方面的一个新的根本性问题。该项目开发了一个全面的安全系统，为各种网络架构和频谱共存范式下与主网络共存的crn奠定了安全骨干。所开发的安全措施从一开始的频谱感知阶段到动态频谱访问过程，直到数据通信阶段，都被相干地嵌入到整个CRN中。针对CRN安全漏洞的三个主要来源，我们的研究目标和重点包括：1)系统地识别CRN中独特的主用户相关攻击，并开发一套攻击检测和防御机制；2)为良性认知用户制定安全、稳健的动态频谱接入策略；3)设计保密和匿名机制，以解决隐私保护方面的不同挑战，充分利用crn在动态频谱利用方面前所未有的灵活性。该项目为开发动态频谱共享新范式的使能安全技术奠定了基础，从而可以大幅提高无线网络的频谱利用效率，为大量具有安全可靠频谱接入的新型认知无线电设备和无线业务提供支持。

The emerging wireless paradigm of dynamic spectrum access via cognitive radio technology has been increasingly recognized for its great potential in drastically enhancing spectrum utilization efficiency. The basic requirements of cognitive radio networks (CRNs) are to protect licensed primary users and provide reliable dynamic spectrum access to secondary cognitive users, which give rise to a new fundamental issue in spectrum access related security. This project develops a comprehensive security system that lays down a secure backbone for CRNs that coexist with primary networks under various network architectures and spectrum coexistence paradigms. The developed security measures are coherently embedded into the entire CRN, from the very beginning of the spectrum sensing stage to the dynamic spectrum access process until the data communication stage. Targeting three main sources of CRN security vulnerability, our research objectives and thrusts include: 1) systematically identify the unique primary user related attacks in CRNs and develop a suite of attack detection and defense mechanisms; 2) develop secure and robust strategies of dynamic spectrum access for benign cognitive users; 3) design confidential and anonymous mechanisms to solve the distinct challenges in privacy protection, taking full advantage of the unprecedented flexibility that CRNs offer in dynamic spectrum utilization. This project lays out the foundation for the development of enabling security technologies for the new paradigm of dynamic spectrum sharing, which in turn can substantially improve the spectrum utilization efficiency of wireless networks, offering a multitude of new cognitive radio devices and wireless services with secure and reliable spectrum access.