Quantum secure dialogue with quantum encryption

Abstract

How to solve the information leakage problem has become the research focus of quantum dialogue. In this paper, in order to overcome the information leakage problem in quantum dialogue, a novel approach for sharing the initial quantum state privately between communicators, i.e., quantum encryption sharing, is proposed by utilizing the idea of quantum encryption. The proposed protocol uses EPR pairs as the private quantum key to encrypt and decrypt the traveling photons, which can be repeatedly used after rotation. Due to quantum encryption sharing, the public announcement on the state of the initial quantum state is omitted, thus the information leakage problem is overcome. The information-theoretical efficiency of the proposed protocol is nearly 100%, much higher than previous information leakage resistant quantum dialogue protocols. Moreover, the proposed protocol only needs single-photon measurements and nearly uses single photons as quantum resource so that it is convenient to implement in practice.

6 pages, 1 table

References in corpus (5)

• Multi-step quantum secure direct communication using multi-particle Green-Horne-Zeilinger state
• Three-party quantum secure direct communication based on Greenberger-Horne-Zeilinger states
• Revisiting the security of quantum dialogue and bidirectional quantum secure direct communication
• Quantum dialogue without information leakage based on the entanglement swapping between any two Bell states and the shared secret Bell state
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Cited by in corpus (6)

• Semi-quantum dialogue based on single photons
• Fault tolerant channel-encrypting quantum dialogue against collective noise
• Fault tolerant authenticated quantum dialogue using logical Bell states
• Information leakage resistant quantum dialogue with single photons in both polarization and spatial-mode degrees of freedom
• A kind of quantum dialogue protocols without information leakage assisted by auxiliary quantum operation
• Quantum dialogue based on quantum encryption with single photons in both polarization and spatial-mode degrees of freedom