TC: Small: Security Provisioning for Cognitive Radio Networks

通过认知无线电技术的动态频谱接入的新兴无线范例已经越来越多地认识到其巨大的潜力，大大提高频谱利用效率。认知无线电网络（CRN）的基本要求是保护授权主用户，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的新的基本问题。该项目开发了一个全面的安全系统，为在各种网络架构和频谱共存范例下与主网络共存的CRN奠定了安全骨干。所开发的安全措施被连贯地嵌入到整个CRN中，从频谱感知阶段的最开始到动态频谱接入过程，直到数据通信阶段。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中与主用户相关的独特攻击，并开发一套攻击检测和防御机制; 2）针对良性认知用户，开发安全、鲁棒的动态频谱接入策略; 3）设计保密和匿名机制来解决隐私保护中的独特挑战，充分利用CRN在动态频谱利用方面提供的前所未有的灵活性。该项目为动态频谱共享新范式的使能安全技术的开发奠定了基础，这反过来又可以大大提高无线网络的频谱利用效率，为众多新的认知无线电设备和无线服务提供安全可靠的频谱接入。

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.