TC: Small: Defending against Insider Jammers in DSSS- and FH-Based Wireless Communication Systems

抗干扰能力对于需要可靠无线通信的应用至关重要，例如救援任务和军事行动。跳频（FH）和直接序列扩频（DSSS）等扩频技术已被用于对抗干扰攻击。然而，这些抗干扰技术要求发送方和接收方共享一个密钥，以便彼此通信。在攻击者能够攻破合法通信设备并获得密钥的情况下，他可以有效地破坏跳频或DSSS无线通信，从而破坏正常的网络运行。一般来说，传统的抗干扰技术，如跳频和DSSS很容易受到内部攻击，因为攻击者可以访问用于抗干扰无线通信的密钥。该项目为DSSS和基于跳频的无线通信系统开发新颖高效的内部抗干扰技术。本研究包括两个重点：第一个重点是开发新的传播/扩散技术，以增强基于dss的无线通信以抵御内部干扰威胁，而第二个重点是开发一种新方法，使基于fh的无线通信能够抵抗内部干扰。这些新方法的一个关键特性是它们不依赖于发送方和接收方共享的任何秘密。该项目将显著增强未来无线通信系统的弹性，特别是那些可能面临潜在对手的关键任务应用（例如，救援任务和军事行动）。在这个项目中获得的成果将通过出版物、研究生水平的课程和软件包的公开发布来传播。

Jamming resistance is crucial for applications where reliable wireless communication is required, such as rescue missions and military operations. Spread spectrum technologies such as Frequency Hopping (FH) and Direct Sequence Spread Spectrum (DSSS) have been used as countermeasures against jamming attacks. However, these anti-jamming techniques require that senders and receivers share a secret key in order to communicate with each other. In situations where the adversary can compromise a legitimate communication device and learn the secret key, she can effectively defeat FH or DSSS wireless communication and thus disrupt normal network operations. In general, traditional anti-jamming techniques such as FH and DSSS are vulnerable to insider attacks where the adversary has access to the secret key used for anti-jamming wireless communication. This project develops novel and efficient insider-jamming-resistant techniques for both DSSS and FH-based wireless communication systems. This research consists of two thrusts: The first thrust develops novel spreading/despreading techniques to enhance DSSS-based wireless communication to defend against insider jamming threats, while the second thrust develops a new approach to enable FH-based wireless communication to be resistant against insider jammers. A key property of these new approaches is that they do not depend on any secret shared by the sender and receivers. This project will significantly enhance the resilience of future wireless communication systems, especially those for mission-critical applications that may face potential adversaries (e.g., rescue missions and military operations). The results obtained in this project will be disseminated through publications, graduate-level courses, and public release of software packages.