Revisiting the security of quantum dialogue and bidirectional quantum secure direct communication

• 来源期刊: 中国科学G辑(英文版)
• 年，卷（期）: 2008,（5）
• 页码范围: 559-566
• 页数: 8页
• 语种: 英文
• DOI: 10.1007/s11433-008-0065-y

摘要

From the perspective of information theory and cryptography, the security of two quantum dialogue protocols and a bidirectional quantum secure direct communi-cation (QSDC) protocol was analyzed, and it was pointed out that the transmitted information would be partly leaked out in them. That is, any eavesdropper can elicit some information about the secrets from the public annunciations of the legal us-ers. This phenomenon should have been strictly forbidden in a quantum secure communication. In fact, this problem exists in quite a few recent proposals and, therefore, it deserves more research attention in the following related study.