Collaborative Research: Communicating Confidential Information over Wireless Networks

合作研究：通过无线网络交流机密信息

• 批准号: 0729142
• 负责人: Predrag Spasojevic
• 金额: $ 5万
• 依托单位: Rutgers University New Brunswick
• 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: 2007-10-01 至 2008-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0729142&HistoricalAwards=false
• 关键词: Collaborative; Research; Communicating; Confidential; Information

This research considers physical layer security in wireless networks. It serves as a counterpoint to traditional methods of security, such as computationally secure crypto-systems, by considering security in the wireless medium itself. An important motivator for this research is the rapid proliferation of wireless communication devices, technologies, and applications, in general. The very nature of wireless networks exposes not only the risks and vulnerabilities that a malicious user can exploit and severely compromise the network but also information confidentiality concerns with respect to the in-network terminals. Although wireless technologies are becoming more and more secure, attackers are becoming smarter, and sole reliance on cryptographic keys in large distributed networks, for example, where terminals can be compromised is unsustainable from the security perspective. A direct consequence of this process is the need to, additionally, tackle security at the very basic physical layer level where the (unconditional) secrecy may be embodied within the information itself, and, also, adapted to the communication medium and network conditions. Furthermore, there is a need for a secure key distribution, a process which can be performed in perfect secrecy only using physical layer techniques, even when, henceforth, relying on conventional cryptographic techniques.This research studies how, in secure wireless networks, the application delay requirement relative to the communication channel coherence time aspects the selection of signaling strategies and the achievable communication rates at a prescribed security level. In addition, perhaps surprisingly,successful design of practical secure nested forward error correction codes and secure adaptive incremental error correction strategies applicable to wireless channels is virtually non-existent. Hence, this research focuses on practical coding-scheme designs as essential enabling tools.

本研究考虑无线网络中的物理层安全。它通过考虑无线介质本身的安全性，作为传统安全方法（如计算安全密码系统）的对立面。这项研究的一个重要推动力是无线通信设备、技术和应用的快速增长。无线网络的本质不仅暴露了恶意用户可以利用并严重损害网络的风险和漏洞，而且还暴露了关于网络内终端的信息保密性问题。虽然无线技术正变得越来越安全，但攻击者正变得越来越聪明，并且从安全角度来看，例如在大型分布式网络中仅依赖于密码密钥是不可持续的，其中终端可能会受到损害。这一过程的直接结果是需要另外在非常基本的物理层级别解决安全性，其中（无条件）保密性可以体现在信息本身中，并且还适应于通信介质和网络条件。此外，还需要一个安全的密钥分发，一个可以只使用物理层技术在完全保密的情况下执行的过程，即使此后依赖于传统的密码技术。相对于通信信道相干时间的应用延迟要求涉及信令策略的选择和在规定的安全级别。此外，也许令人惊讶的是，实际的安全嵌套前向纠错码和安全的自适应增量纠错策略适用于无线信道的成功设计几乎是不存在的。因此，本研究的重点是实际的编码方案设计作为必要的使能工具。