arXiv 0903.34442009-03-20quant-ph

具有相互认证的量子直接通信

Quantum direct communication with mutual authentication

Cheng-An Yen, Shi-Jinn Horng, Hsi-Sheng Goan, Tzong-Wann Kao, Yao-Hsin Chou

发表信息：: Quantum Information & Computation, Vol.9, No.5&6 (2009) 0376-0394

摘要：

本文首先指出最近提出的一些带认证的量子直接通信（QDC）协议在某些特定的攻击下是脆弱的，秘密消息会泄露给被引入来认证参与通信的用户的认证者。然后，我们提出了一个新的协议，是能够实现安全的QDC与认证，只要验证者会做的认证工作忠实。我们的量子协议引入了一个相互认证过程，使用量子贝尔态，并在认证过程中应用幺正变换。然后在通信过程中充分利用了纠缠交换和局域幺正操作。因此，在认证过程之后，客户端用户被单独留下以彼此通信，并且客户端用户不能访问秘密消息。此外，我们的协议不需要任何两个想要相互通信的用户之间的直接量子链路。这在实际量子通信网络的实现中也可能是吸引人的优点。

英文摘要：

In this paper, we first point out that some recently proposed quantum direct communication (QDC) protocols with authentication are vulnerable under some specific attacks, and the secrete message will leak out to the authenticator who is introduced to authenticate users participating in the communication. We then propose a new protocol that is capable of achieving secure QDC with authentication as long as the authenticator would do the authentication job faithfully. Our quantum protocol introduces a mutual authentication procedure, uses the quantum Bell states, and applies unitary transformations in the authentication process. Then it exploits and utilizes the entanglement swapping and local unitary operations in the communication processes. Thus, after the authentication process, the client users are left alone to communicate with each other, and the authenticator has no access to the secrete message. In addition, our protocol does not require a direct quantum link between any two users, who want to communicate with each other. This may also be an appealing advantage in the implementation of a practical quantum communication network.

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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