Collaborative Research: CIF: Medium: Security through the Lens of Information Asymmetry: A Pragmatic Evolution of Goals and Models in Physical Layer Security

5G和物联网以外的未来网络的需求要求采取全面包容的安全方法。通过利用通信通道的缺陷，物理层安全将安全考虑融入到通信系统的设计中，具有诸如能源效率和简化密钥管理等好处；然而，物理层安全经常强加要求，这阻碍了它的实际采用和部署。此外，在物理层安全特别适合并且不存在明显的加密解决方案的一些应用中，例如需要隐蔽性的情况，迄今为止的结果在预测的数据传输速度方面令人失望。这个项目解决了这两点。该项目的成果可以确保未来网络中的安全无线通信，并将对性能的影响降至最低。本项目的第一个主旨是通过对抗对手的信息不对称的视角为合作安全的研究带来了一个新的视角。该项目的这一部分旨在阐明合作如何向一个用户提供关于另一个用户的信号所引起的信道变化的知识，从而产生相对于对手的新的、迄今未预见到的优势。该项目的第二个重点是探索信息不对称对秘密通信的好处，包括信道状态知识的作用，这被预见为一种关键机制，不仅可以绕过秘密通信的平方根定律，而且还可以减轻对共享密钥的需求。将研究在不同节点上可用的不同质量的频道状态的影响。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

The needs of future networks beyond 5G and Internet of Things call for a comprehensive and inclusive approach to security. By harnessing the imperfections of communication channels, physical-layer security integrates security concerns into the design of communication systems with benefits such as energy efficiency and simplified key management; physical-layer security often imposes requirements, however, which has impeded its practical adoption and deployment. Furthermore, in some applications where physical-layer security is uniquely suitable and no obvious cryptographic solution exists, such as situations requiring covertness, results to date have been disappointing in terms of predicted data transmission speeds. This project addresses these two points. The outcomes of this project can ensure secure wireless communications in future networks with minimal performance impact. The first thrust of this project brings a new perspective to the study of cooperative security through the lens of information asymmetry against adversaries. This part of the project aims to elucidate how cooperation can provide knowledge to one user about the variations in the channel induced by the signaling of another in a manner that creates new and hitherto unforeseen advantages over an adversary. The second thrust of this project explores the benefits of information asymmetry for covert communications, including the role of channel state knowledge, which is foreseen as a key mechanism to not only circumvent the square-root law of covert communication but also to alleviat the need for a shared secret key. The impact of different-quality channel states being available at different nodes will be studied.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.