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arXiv 1502.06319quant-ph
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中继QKD网络和比特传输

Relay QKD Networks & Bit Transport

Simon J. D. Phoenix, Stephen M. Barnett

摘要:

我们展示了如何通过将每个中继视为操作拦截/重发策略的可信窃听者来在QKD网络上操作端到端中继。结果表明,通过引入比特传输的概念,与单链路信道相比,密钥速率不受影响。比特传输技术扩展了QKD网络的性能。我们还讨论了降低中继所需的信任水平的技术。特别是,我们证明,它是可能的,以创建一个简单的量子密钥交换方案,使用秘密共享,使通过添加一个额外的中继多中继信道上的窃听者需要妥协的所有中继信道。通过将其与多路径能力和异步量子密钥建立相结合,我们表明,实际上,窃听者必须妥协整个网络上的所有中继,并从一开始就收集整个网络上的数据。

英文摘要:

We show how it is possible to operate end-to-end relays on a QKD network by treating each relay as a trusted eavesdropper operating an intercept/resend strategy. It is shown that, by introducing the concept of bit transport, the key rate compared to that of single-link channels is unaffected. The technique of bit transport extends the capability of QKD networks. We also discuss techniques for reducing the level of trust required in the relays. In particular we demonstrate that it is possible to create a simple quantum key exchange scheme using secret sharing such that by the addition of a single extra relay on a multi-relay channel requires the eavesdropper to compromise all the relays on the channel. By coupling this with multi-path capability and asynchronous quantum key establishment we show that, in effect, an eavesdropper has to compromise all relays on an entire network and collect data on the entire network from its inception.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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