Practical Quantum Private Database Queries Based on Passive Round-Robin Differential Phase-shift Quantum Key Distribution

Li, Jian; Yang, Yu‐Guang; Chen, Xiu-Bo; Zhou, Yi‐Hua; Shi, Wei‐Min

doi:10.1038/srep31738

Cited by 21 publications

(7 citation statements)

References 30 publications

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“…When Eve successfully gets I (d SPP ) information transfer in 1 message qubit without being detected, the amount of probability is (s 1 ) 1/I (d SPP ) , and 1/I (d SPP ) is the expected times that Eve detects the communication. If Eve wants to gets nI (d SPP ) information from n message qubits, the successfully probability can be described as: (21) Suppose Alice and Bob have the probability of c = 0.5 to choose control mode, Eq. 21 describes the relationship in the amount of information that Eve gets n ∈ [0, 50], the probability d ∈ (0, 0.5) that Eve takes an eavesdropping operation.…”

Section: Security Analysismentioning

confidence: 99%

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Deterministic Quantum Secure Direct Communication Protocol Based on Omega State

et al. 2019

IEEE Access

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A quantum secure direct communication (QSDC) protocol is presented. In the proposed protocol, the omega state is introduced to detect the eavesdropping during the quantum communication, eavesdropping behaviors will change the state of the omega state, and the sender Alice and the receiver Bob detect eavesdropping through the state measurement results. The relationship between the amount of information that the eavesdropper gets and the probability of being detected is also given. Compared with the original QSDC protocol based on the Bell state, when the same amount of information is obtained, the eavesdropper must face a higher detection probability in the proposed protocol, and the eavesdropper mostly can obtain 0.676 (bit) of information. The security analysis is also given, and the result indicates that the proposed protocol is more secure. A simulation based on the law of large number and the Monte Carlo method is also given, and the mean square error is introduced to describe the similarity between the simulation data and the theoretical value. The simulation result indicates that the proposed security in an ideal environment and the security analysis are correct, and the proposed protocol is more secure by sending more quantum particles in detecting eavesdropping.

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Section: Security Analysismentioning

confidence: 99%

“…In 1984, Bennett and Brassard [16] presented the first QKD protocol, which called the BB84 protocol. This protocol indicted that quantum qubits can replace classical bits in communication, the BB84 protocol and its improve protocols are still widely used in quantum communication [16]- [21].…”

Section: Introductionmentioning

confidence: 99%

Deterministic Quantum Secure Direct Communication Protocol Based on Omega State

et al. 2019

IEEE Access

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“…In light of these negative results, protocols for SPIR have largely evolved to cheat-sensitive protocols, also known as quantum private query [ 11 ]. Examples of these protocols include those based on quantum oblivious key distribution [ 12 , 13 , 14 , 15 , 16 ], those based on sending states to a database oracle [ 17 , 18 ], and those based on round-robin QKD protocol [ 19 ]. In these protocols, the parties are averse to being caught cheating, so cheat-detection strategies allows one to construct protocols with more relaxed conditions as compared to those of SPIR [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Provably Secure Symmetric Private Information Retrieval with Quantum Cryptography

Kon

Lim

2020

Entropy

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Private information retrieval (PIR) is a database query protocol that provides user privacy in that the user can learn a particular entry of the database of his interest but his query would be hidden from the data centre. Symmetric private information retrieval (SPIR) takes PIR further by additionally offering database privacy, where the user cannot learn any additional entries of the database. Unconditionally secure SPIR solutions with multiple databases are known classically, but are unrealistic because they require long shared secret keys between the parties for secure communication and shared randomness in the protocol. Here, we propose using quantum key distribution (QKD) instead for a practical implementation, which can realise both the secure communication and shared randomness requirements. We prove that QKD maintains the security of the SPIR protocol and that it is also secure against any external eavesdropper. We also show how such a classical-quantum system could be implemented practically, using the example of a two-database SPIR protocol with keys generated by measurement device-independent QKD. Through key rate calculations, we show that such an implementation is feasible at the metropolitan level with current QKD technology.

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“…But there is still a serious problem on how to distribute the key safely. [3][4][5] Different from the classical secure communication protocol, quantum secure communication (QSC) protocol is based on the fundamental laws of quantum physics rather than the complexity of computing. So QSC has much higher performance of security.…”

Section: Introductionmentioning

confidence: 99%

The security analysis of E91 protocol in collective-rotation noise channel

et al. 2018

International Journal of Distributed Sensor Networks

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The bit error in quantum communication is mainly caused by eavesdropping and noise. However, most quantum communication protocols only take eavesdropping into consideration and ignore the result of noise, making the inaccuracy situations in detecting the eavesdropper. To analyze the security of the quantum E91 protocol presented by Ekert in collective-rotation noise channel, an excellent model of noise analysis is proposed. The increment of the qubits error rate (ber) is used to detect eavesdropping. In our analysis, eavesdropper (Eve) can maximally get about 50% of the key from the communication when the noise level approximates to 0.5. The results show that in the collective-rotation noise environment, E91 protocol is secure and the raw key is available just as we have knew and proved. We also presented a new idea in analyzing the protocol security in noise channel.

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Practical Quantum Private Database Queries Based on Passive Round-Robin Differential Phase-shift Quantum Key Distribution

Cited by 21 publications

References 30 publications

Deterministic Quantum Secure Direct Communication Protocol Based on Omega State

Deterministic Quantum Secure Direct Communication Protocol Based on Omega State

Provably Secure Symmetric Private Information Retrieval with Quantum Cryptography

The security analysis of E91 protocol in collective-rotation noise channel

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