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arXiv quant-ph/0301048quant-ph
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基于乒乓协议的无公共信道确定性安全直接通信

Deterministic Secure Direct Communication Using Ping-pong protocol without public channel

Qing-yu Cai

摘要:

基于EPR量子比特对,并允许渐近安全的密钥分配,提出了一个安全通信协议。Bob将EPR对量子比特中的任一个发送给Alice。爱丽丝接收旅行量子比特。然后,她可以通过对这个旅行量子比特的局部幺正操作来编码经典信息。爱丽丝将量子比特发送回鲍勃。Bob通过对Bell算符基的两个光子进行测量,可以得到Alice的信息。如果伊芙排队,她就不能访问鲍勃的家乡量子位。她的所有操作都只限于旅行量子位。为了找出爱丽丝执行的操作,夏娃的操作必须包括测量。EPR对量子比特被破坏。Bob在Bell算符基础上对两个光子的测量可以帮助他判断Eve是否存在。在这个协议中,公共信道是不必要的。

英文摘要:

Based on an EPR pair of qubits and allowing asymptotically secure key distribution, a secure communication protocol is presented. Bob sends either of the EPR pair qubits to Alice. Alice receives the travel qubit. Then she can encode classical information by local unitary operations on this travel qubit. Alice send the qubit back to Bob. Bob can get Alice's information by measurement on the two photons in Bell operator basis. If Eve in line, she has no access to Bob's home qubit. All her operations are restricted to the travel qubit. In order to find out which opeartion Alice performs, Eve's operation must include measurements. The EPR pair qubits are destroyed. Bob's measurement on the two photons in Bell operator basis can help him to judge whether Eve exist in line or not. In this protocal, a public channel is not necessary.

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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