CT-ISG: Trustworthy Spectrum Sharing in Software Defined Radio Networks

软件无线电（SDR）是一项革命性的技术，有望缓解频谱短缺问题，提高频谱利用效率。传统无线电是用专用集成电路（ASIC）技术制造的。更改此类设备需要高技术技能和专用设备，因此大多数攻击者无法对设备进行未经授权的更改。SDR技术的出现引发了新的安全问题。攻击者很有可能通过修改SDR的无线电软件来修改用户服务或重新配置SDR的射频参数。这引起了监管机构、运营商和用户对SDR系统安全漏洞的严重质疑。目前SDR研究和标准化工作的重点是基于密码系统的预防性安全措施。预防性安全措施是指确保无线电软件下载过程的安全措施，或阻止软件下载后被篡改的方案。然而，最近的研究表明，不能排除恶意软件对sdr进行不当操作的可能性。为了解决这个问题，在这个项目中，我们研究了当攻击者能够在SDR上安装恶意软件或修改已经安装的软件时构成最大威胁的安全问题，特别关注无法使用加密技术解决的威胁。具体来说，研究的重点是研究SDR网络物理层和MAC层的安全漏洞。这项研究通过解决以前没有研究过的安全问题，满足了特别提款权研究界的关键需求。预计该项目的研究成果将使参与SDR开发的监管机构、服务提供商和制造商受益。

Project AbstractCT-ISG: Trustworthy Spectrum Sharing in Software Defined Radio NetworksSoftware defined radio (SDR) is a revolutionary technology that promises to alleviate the spectrum shortage problem and bring about improvements in spectrum utilization efficiency. Conventional radios are built using ASIC (application specific integrated circuit) technology. Changes to such devices require highly technical skills and specialized equipment, thus making unauthorized changes to the devices infeasible for most adversaries. The emergence of SDR technology raises new security implications. It is quite possible for adversaries to modify user services or reconfigure RF parameters of an SDR by revising its radio software. This raises serious questions among regulators, operators, and users about the security vulnerabilities in SDR systems. The current focus of the SDR research and standardization efforts is on preventive security measures based on cryptosystems. Preventive security measures are measures that secure the radio software download process or schemes that thwart the tampering of the software once it has been downloaded. Recent studies, however, have shown that the possibility of inappropriate operation of SDRs due to malicious software cannot be precluded. To address this concern, in this project, we study security issues that pose the greatest threat when an adversary is able to install malicious software or modify already installed software on an SDR, with particular focus on threats that cannot be addressed using cryptographic techniques. Specifically, the focus of the research is on studying security vulnerabilities in the PHY and MAC layers of SDR networks. This research serves a critical need in the SDR research community by addressing security issues that have not been studied previously. It is expected that the research findings from this project will benefit regulators, service providers, and manufacturers involved in SDR development.