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

Abstract

From the perspective of information theory and cryptography, we analyze the security of two quantum dialogue protocols and a bidirectional quantum secure direct communication (QSDC) protocol, and point 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 users. 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.

An authors' note was added. That is, when this study was completed, we found that the insecurity of quantum dialogue was independently pointed out by Tan and Cai (see arXiv:0802.0358)

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Cited by in corpus (18)

• Quantum dialogue without information leakage based on the entanglement swapping between any two Bell states and the shared secret Bell state
• Semi-quantum dialogue based on single photons
• Quantum secure dialogue with quantum encryption
• Large payload bidirectional quantum secure direct communication without information leakage
• Fault tolerant authenticated quantum dialogue using logical Bell states
• Information leakage resistant quantum dialogue against collective noise
• Fault tolerant channel-encrypting quantum dialogue against collective noise
• Quantum asymmetric cryptography with symmetric keys
• Information leakage resistant quantum dialogue with single photons in both polarization and spatial-mode degrees of freedom
• Controller-independent bidirectional quantum direct communication
• Two Efficient Measurement Device Independent Quantum Dialogue Protocols
• A kind of quantum dialogue protocols without information leakage assisted by auxiliary quantum operation
• Improving the Security of "Measurement-Device-Independent Quantum Communication without Encryption"
• Quantum Secure Direct Communication with Mutual Authentication using a Single Basis
• Two Quantum Proxy Blind Signature Schemes Based on Controlled Quantum Teleportation
• Secure quantum dialogue via cavity QED
• Secure Multi-Party Quantum Conference and Xor Computation
• Quantum dialogue based on quantum encryption with single photons in both polarization and spatial-mode degrees of freedom