论文标题
窃听下的安全状态更新：基于信息的物理层安全性指标
Secure Status Updates under Eavesdropping: Age of Information-based Physical Layer Security Metrics
论文作者
论文摘要
这封信研究了在被动窃听攻击下保持信息新鲜度的问题。考虑了经典的三节点窃听频道模型，其中源旨在将其最新状态无线地发送到其预期的目的地，同时保护消息免于被窃听者偷听。考虑到传统的基于渠道容量的保密指标不再足以衡量状态更新系统中的信息及时性，我们定义了两个基于信息的新时代的指标来表征所考虑系统的保密性能。我们进一步提出，分析和优化了在源头实施的随机固定传输策略，以进一步提高保密性能。提供仿真结果以验证我们的分析和优化。
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.
