Quantum private comparison protocol based on 4D GHZ-like states

Liu, Chao; Zhou, Shun; Gong, Li; Chen, Hua-Ying

doi:10.1007/s11128-023-03999-y

Cited by 7 publications

(6 citation statements)

References 37 publications

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“…[ Compared with QPC protocols in Refs. [9,16,18,22,26,[37][38][39][40], our protocol has the following advantages. First, our protocol does not require QKD protocol for sharing a secret key to ensure the security of the inputs.…”

Section: Ref [9]mentioning

confidence: 99%

Efficient Quantum Private Comparison Based on GHZ States

Hou,

Wu,

Zhang

2024

Entropy

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Quantum private comparison (QPC) is a fundamental cryptographic protocol that allows two parties to compare the equality of their private inputs without revealing any information about those inputs to each other. In recent years, QPC protocols utilizing various quantum resources have been proposed. However, these QPC protocols have lower utilization of quantum resources and qubit efficiency. To address this issue, we propose an efficient QPC protocol based on GHZ states, which leverages the unique properties of GHZ states and rotation operations to achieve secure and efficient private comparison. The secret information is encoded in the rotation angles of rotation operations performed on the received quantum sequence transmitted along the circular mode. This results in the multiplexing of quantum resources and enhances the utilization of quantum resources. Our protocol does not require quantum key distribution (QKD) for sharing a secret key to ensure the security of the inputs, resulting in no consumption of quantum resources for key sharing. One GHZ state can be compared to three bits of classical information in each comparison, leading to qubit efficiency reaching 100%. Compared with the existing QPC protocol, our protocol does not require quantum resources for sharing a secret key. It also demonstrates enhanced performance in qubit efficiency and the utilization of quantum resources.

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Section: Ref [9]mentioning

confidence: 99%

Efficient Quantum Private Comparison Based on GHZ States

Hou,

Wu,

Zhang

2024

Entropy

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“…In 2022, Fan et al [17] utilized an eight-qubit entangled state for private data comparison through quantum key distribution and joint computation. In 2023, Liu [18] employed high-dimensional GHZ-like states as quantum resources, and Zhang et al [19] introduced a QPC protocol based on homomorphic encryption, allowing multiple participants to engage in simultaneous comparisons.…”

Section: Related Workmentioning

confidence: 99%

Efficient Quantum Private Comparison without Sharing a Key

Li,

Che,

Wang

et al. 2023

Entropy

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Quantum private comparison (QPC) allows at least two users to compare the equality of their secret information, for which the security is based on the properties of quantum mechanics. To improve the use of quantum resources and the efficiency of private comparison, a new QPC protocol based on GHZ-like states is proposed. The protocol adopts unitary operations to encode the secret information instead of performing quantum key distribution (QKD), which can reduce the amount of computation required to perform QKD and improve the utilization of quantum resources. The decoy photon technique used to detect channel eavesdropping ensures that the protocol is resistant to external attacks. The quantum efficiency of the protocol reaches 66%. Compared with many previous QPC schemes, the proposed protocol does not need to share a key and has advantages in quantum efficiency and quantum resources.

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“…Besides, to compare both the size and the equality of privacies, Chen et al came up with a novel two-party QPC protocol via quantum walks on circle [8]. Other than that, there are considerable QPC protocols based on other quantum states that have been investigated [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Novel semi-quantum private comparison protocol with Bell states

Gong,

Li,

Cao

et al. 2024

Laser Phys. Lett.

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Based on Bell states, a new semi-quantum private comparison protocol is proposed that enables two classical users to securely compare the equality of their private information with the aid of a semi-honest third party. Different from the existing semi-quantum private comparison protocols, the two classical participants in the presented protocol do not need to measure and prepare any quantum state, which not only reduces the consumption of quantum devices, but also greatly improves the feasibility of the protocol. Performing different unitary operations on the received particles, classical users can securely compare their secret information. Besides, the devised protocol has higher qubit efficiency than the other similar counterparts, since participants can compare a two-bit privacy each time with one qubit. Meanwhile, after completing the comparison process, all Bell states could be reused since they still retain the corresponding entanglement property, which greatly facilitates the recycle of quantum resources. Security analyses indicate that the designed scheme is secure against external attack and internal attack. Moreover, the operations involved in our scheme are simulated on the IBM Quantum Experience to demonstrate the effectiveness and security of our scheme.

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Quantum private comparison protocol based on 4D GHZ-like states

Cited by 7 publications

References 37 publications

Efficient Quantum Private Comparison Based on GHZ States

Efficient Quantum Private Comparison Based on GHZ States

Efficient Quantum Private Comparison without Sharing a Key

Novel semi-quantum private comparison protocol with Bell states

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