Quantum Secure Direct Communication with Authentication Expansion Using Single Photons

• 来源期刊: 理论物理通讯(英文版)
• 学科: 工学
• 关键词: 量子安全直接通信 认证过程 单光子 量子通信 身份验证协议 扩展方法 通信过程 秘密信息
• 年，卷（期）: 2010,（11）
• 页码范围: 829-834
• 页数: 6页
• 分类号: TP393.08 TN918.1
• 语种: 英文

摘要

In this paper we propose two quantum secure direct communication (QSDC) protocols with authentication.The authentication key expansion method is introduced to improve the life of the keys with security.In the first scheme,the third party, called Trent is introduced to authenticate the users that participate in the communication.He sends thepolarized photons in blocks to authenticate communication parties Alice and Bob using the authentication keys.In thecommunication process, polarized single photons are used to serve as the carriers, which transmit the secret messagesdirectly.The second QSDC process with authentication between two parties is also discussed.