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Practical Quantum Private Query with Classical Participants |
| Min Xiao1, Di-Fang Zhang2** |
1Institute of Computer Forensics, Chongqing University of Posts and Telecommunications, Chongqing 400065
2College of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065
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| Cite this article: |
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Min Xiao, Di-Fang Zhang 2019 Chin. Phys. Lett. 36 030301 |
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Abstract Quantum key distribution (QKD)-based quantum private query (QPQ) is a practical application of QKD, which relaxes the security condition of perfectly concealing a private query to a cheating-sensitive strategy. We propose a QPQ protocol based on the delegated QKD scheme (DQKD-based QPQ), in which two almost 'classical' clients (data user and database owner) can establish a 1-out-of-N oblivious key with the help of a cloud server with full quantum ability. Concretely, the two classical participants in the DQKD-based QPQ only need to access the quantum channel and reorder qubits, and the costly quantum operations, quantum state preparation and measurement are outsourced to a full quantum server in the cloud without leaking participants' privacy. The proposed protocol not only provides a cloud-based framework of QKD-based QPQ, but also obtains better security by a real-time security check, which can protect the security of the database and user against all potential attacks even if the quantum server is assumed to be a powerfully untrusted adversary.
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Received: 17 November 2018
Published: 24 February 2019
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| PACS: |
03.67.Dd
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(Quantum cryptography and communication security)
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03.67.Pp
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(Quantum error correction and other methods for protection against decoherence)
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03.67.Hk
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(Quantum communication)
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| Fund: Supported by the National Key R&D Program of China under Grant No 2017YFB0802300, and the Foundation Science and Forefront Technology of Chongqing Science and Technology Commission of China under Grant No cstc2016jcyjA0571. |
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