Secure Status Updates under Eavesdropping: Age of Information-based Physical Layer Security Metrics
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.
Cite
@article{arxiv.2002.07340,
title = {Secure Status Updates under Eavesdropping: Age of Information-based Physical Layer Security Metrics},
author = {He Chen and Qian Wang and Parthajit Mohapatra and Nikolaos Pappas},
journal= {arXiv preprint arXiv:2002.07340},
year = {2020}
}
Comments
Submitted for possible publication. The first two authors contributed equally to this work