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On Secure Communications Over a Wiretap Channel With Fixed-Rate Transmission: Protocol Design and Queueing Analysis

机译:固定速率传输的窃听通道上的安全通信:协议设计和排队分析

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摘要

In this letter, we consider a wiretap channel when a source node maintains two buffers (queues) to store its data and secret key packets. We propose two medium-access protocols. In the first proposed protocol, we assume that the legitimate source and its destination share random secret key packets when the main channel is better than either the channel between the eavesdropper and the source or the channel between the eavesdropper and the destination. These key packets are stored in a separate key queue at the source and its destination, and they are utilized to secure data packets whenever channel conditions favor eavesdropper channels over the main communication channel. In the second proposed protocol, the source employs a random-access scheme based on the link and queue states. Our numerical results demonstrate the gains of our proposed protocols in terms of the mean service rate of the data queue and the average queueing delay of the data packets.
机译:在这封信中,我们考虑当源节点维护两个缓冲区(队列)以存储其数据和密钥包时的窃听通道。我们提出了两种媒体访问协议。在第一个提出的协议中,我们假设当主通道比窃听者与源之间的通道或窃听者与目的地之间的通道更好时,合法源及其目的地共享随机密钥包。这些密钥包存储在源及其目的地的单独密钥队列中,并且只要通道条件比主通信通道更喜欢窃听者通道,它们就可用于保护数据包。在第二个提议的协议中,源采用基于链接和队列状态的随机访问方案。我们的数值结果证明了我们提出的协议在数据队列的平均服务速率和数据包的平均排队延迟方面的优势。

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