Optimal throughput for covert communication over a classical-quantum channel
Optimal throughput for covert communication over a classical-quantum channel
复制标题
经典量子信道上隐蔽通信的最佳吞吐量
DOI：
10.1109/itw.2016.7606857
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Ligong Wang
中科院分区：
文献类型：
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作者：
Ligong Wang
本文考虑了无记忆经典量子窃听信道上的通信问题，该信道受到以下约束：信道上的窃听者不应该能够以高置信度获知合法各方是否正在使用该信道进行通信。具体来说，当传输码字时和不提供输入时，窃听者的输出量子态之间的相对熵必须足够小。扩展了早期的工作，本文证明了广泛的经典量子通道的“平方根定律”：在使用 n 个通道尺度（如 √n）时可以可靠且隐蔽地传输的最大信息量。缩放常数也被确定。
This paper considers the problem of communication over a memoryless classical-quantum wiretap channel subject to the constraint that the eavesdropper on the channel should not be able to learn with high confidence whether the legitimate parties are using the channel to communicate or not. Specifically, the relative entropy between the output quantum states at the eavesdropper when a codeword is transmitted and when no input is provided must be sufficiently small. Extending earlier works, this paper proves the “square-root law” for a broad class of classical-quantum channels: the maximum amount of information that can be reliably and covertly transmitted over n uses of such a channel scales like √n. The scaling constant is also determined.