Opportunism, Cooperation and Feedback for Wireless Secrecy

无线保密的机会主义、合作和反馈

• 批准号: 0728762
• 负责人: Hesham El Gamal
• 金额: $ 20万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0728762&HistoricalAwards=false
• 关键词: Opportunism; Cooperation; Feedback; Wireless; Secrecy

The design of efficient wireless networks presents exciting challenges which are markedly different from their counterparts in wire-line networks. Of particular interest is the perceived vulnerability of wireless networks to security attacks. Ensuring network robustness against various types of security threats is, therefore, one of the important design objectives.This project adopts a new optimistic perspective in which the wireless medium is viewed as a resource instead of a liability. In particular, we identify three principles, namely opportunism, cooperation and feedback by which the wireless channel can be efficiently exploited to counter passive eavesdropping attacks. The first research thrust is dedicated to developing an opportunistic secrecy framework in which the multi-path fading fluctuations are used to create an advantage for the legitimate destination(s) overthe eavesdropper(s). Our investigations seek to characterize the fundamental limits of opportunistic secrecy and develop low complexity protocols capable of leveraging the corresponding performance gain. The second research thrust aims to: 1) develop novel cooperation strategies inspired by the secrecy constraint, 2)derive sharp secrecy capacity results for certain instances of the relay-eavesdropper channel and 3) identify the scaling behavior of cooperative secrecy protocols in large scale hierarchical and ad-hocwireless networks. Finally, the third thrust involves characterizing the fundamental limits of secure communication over closed loop channels and the structure of the corresponding feedback policies inthe context of memoryless, fading and multi-user channels.

高效无线网络的设计提出了令人兴奋的挑战，这些挑战与有线网络中的对应挑战明显不同。特别令人感兴趣的是无线网络对安全攻击的脆弱性。因此，确保网络针对各种类型的安全威胁的稳健性是重要的设计目标之一。该项目采用了一种新的乐观视角，将无线介质视为一种资源而不是一种责任。特别是，我们确定了三个原则，即机会主义、合作和反馈，通过这些原则可以有效地利用无线信道来对抗被动窃听攻击。第一个研究重点致力于开发机会主义保密框架，其中使用多路径衰落波动为合法目的地创造相对于窃听者的优势。我们的研究旨在描述机会主义保密的基本限制，并开发能够利用相应性能增益的低复杂性协议。第二个研究重点旨在：1）受保密约束启发，开发新颖的合作策略，2）针对中继窃听者通道的某些实例得出清晰的保密容量结果，3）识别大规模分层和自组织无线网络中合作保密协议的扩展行为。最后，第三个重点涉及描述闭环通道上安全通信的基本限制以及无记忆、衰落和多用户通道背景下相应反馈策略的结构。