Secure Status Updates under Eavesdropping: Age of Information-based Physical Layer Security Metrics

2020/02/18 by He Chen, Chen, He, Qian Wang +5 · 2 citations
Computer Science · Engineering · #Age of Information Optimization #Distributed systems and fault tolerance #Wireless Communication Security Techniques

paper · pdf · doi:10.48550/arxiv.2002.07340

Abstract

This letter studies the problem of maintaining information freshness under passive eavesdropping attacks. The classical three-node wiretap channel model is considered, in which a source aims to send its latest status wirelessly to its intended destination, while protecting the message from being overheard by an eavesdropper. Considering that conventional channel capacity-based secrecy metrics are no longer adequate to measure the information timeliness in status update systems, we define two new age of information-based metrics to characterize the secrecy performance of the considered system. We further propose, analyze, and optimize a randomized stationary transmission policy implemented at the source for further enhancing the secrecy performance. Simulation results are provided to validate our analysis and optimization.

Cited by

• Software-Defined Radio Implementation of Age-of-Information-Oriented Random Access
• Covert Communications with Constrained Age of Information

Related

• It Is Rude to Ask a Sensor Its Age-of-Information: Status Updates Against an Eavesdropping Node
• Achieving Covertness and Secrecy: A New Paradigm for Secure Wireless Communication
• Wireless Information-Theoretic Security - Part I: Theoretical Aspects
• Low-latency Secure Integrated Sensing and Communication with Transmitter Actions
• Improving Anti-Eavesdropping Ability without Eavesdropper's CSI: A Practical Secure Transmission Design Perspective