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arXiv 0901.1932quant-ph
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量子密码系统中多个Escherichia dropers的最优攻击策略

Attack of Many Eavesdroppers via Optimal Strategy in Quantum Cryptography

Eylee Jung, Mi-Ra Hwang, DaeKil Park, Hungsoo Kim, Eui-Soon Yim, Jin-Woo Son

摘要:

我们研究的情况下,$n$窃听攻击Bennett-Bennard密码协议通过自己的最佳和对称的策略。信息增益和互信息与发送方为每个窃听明确推导。对于任意$n$窃听者的情况,接收器的错误率可以使用递归关系导出。虽然第一个窃听者可以获得互信息,而不会受到其他窃听者的干扰,但随后的窃听通常会增加接收器的错误率。其他窃听者不能充分地获得关于输入信号的信息。结果,每个窃听者获得的信息变得小于最优信息。

英文摘要:

We examine a situation that $n$ eavesdroppers attack the Bennett-Brassard cryptographic protocol via their own optimal and symmetric strategies. Information gain and mutual information with sender for each eavesdropper are explicitly derived. The receiver's error rate for the case of arbitrary $n$ eavesdroppers can be derived using a recursive relation. Although first eavesdropper can get mutual information without disturbance arising due to other eavesdroppers, subsequent eavesdropping generally increases the receiver's error rate. Other eavesdroppers cannot gain information on the input signal sufficiently. As a result, the information each eavesdropper gains becomes less than optimal one.

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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