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arXiv 1503.01498quant-ph
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双向量子密码的有限密钥长度分析

Finite key size analysis of two-way quantum cryptography

Jesni Shamsul Shaari, Stefano Mancini

摘要:

量子密码协议通常利用单向量子信道来解决将共享秘密串分发给两个相距遥远的用户的问题。然而,已经提出了利用双向量子信道的替代协议用于相同的目标并且具有潜在的优点。本文综述了利用熵不确定性关系对双向量子密钥分发协议抵抗最一般的窃听攻击的安全性证明。然后,通过诉诸的“平滑”版本的熵,我们扩展这样的证明有限的密钥大小的情况下。将结果与单向协议的结果进行比较,显示出一些优势。

英文摘要:

Quantum cryptographic protocols solve the longstanding problem of distributing a shared secret string to two distant users by typically making use of one-way quantum channel. However, alternative protocols exploiting two-way quantum channel have been proposed for the same goal and with potential advantages. Here we overview a security proof for two-way quantum key distribution protocols, against the most general eavesdropping attack, that utilize an entropic uncertainty relation. Then, by resorting to the `smooth' version of involved entropies, we extend such a proof to the case of finite key size. The results will be compared to those available for one-way protocols showing some advantages.

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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