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。诸如跳频（FH）和直接序列扩频（DSSS）的扩频技术已经被用作对抗干扰攻击的对策。然而，这些抗干扰技术要求发射机和接收机共享密钥以便彼此通信。在攻击者可以危害合法通信设备并学习密钥的情况下，她可以有效地击败FH或DSSS无线通信，从而破坏正常的网络操作。一般来说，传统的抗干扰技术，如跳频和直扩是脆弱的内部攻击，对手可以访问用于抗干扰无线通信的秘密密钥。本计画针对直扩及跳频无线通讯系统，发展新颖且有效的抗内部干扰技术。本研究包括两个推力：第一推力开发新的扩频/解扩技术，以提高基于DSS的无线通信，以抵御内部干扰的威胁，而第二推力开发一种新的方法，使FH为基础的无线通信，以抵抗内部干扰。这些新方法的一个关键特性是它们不依赖于发送者和接收者共享的任何秘密。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（例如，救援任务和军事行动）。该项目取得的成果将通过出版物、研究生课程和软件包的公开发行加以传播。

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.