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This summary is machine-generated.

This study introduces an efficient quantum private comparison (QPC) protocol using GHZ states. It enhances resource utilization and achieves 100% qubit efficiency without needing quantum key distribution (QKD).

Keywords:
GHZ statesefficiencyquantum private comparison (QPC)rotation operation

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Area of Science:

  • Quantum Information Science
  • Cryptography
  • Quantum Computing

Background:

  • Quantum private comparison (QPC) protocols enable secure equality checks of private data.
  • Existing QPC protocols suffer from low quantum resource utilization and qubit efficiency.
  • There is a need for more efficient and resource-conscious QPC solutions.

Purpose of the Study:

  • To propose a novel and efficient quantum private comparison (QPC) protocol.
  • To enhance the utilization of quantum resources and improve qubit efficiency in QPC.
  • To develop a QPC protocol that does not rely on quantum key distribution (QKD).

Main Methods:

  • Utilizing Greenberger-H Horne Zeilinger (GHZ) states for secure comparison.
  • Employing rotation operations with secret information encoded in rotation angles.
  • Transmitting quantum sequences along a circular mode for resource multiplexing.

Main Results:

  • Achieved 100% qubit efficiency, comparing three classical bits per GHZ state.
  • Significantly enhanced quantum resource utilization through multiplexing.
  • Eliminated the need for quantum key distribution (QKD), saving quantum resources.

Conclusions:

  • The proposed GHZ-based QPC protocol offers superior efficiency and resource utilization compared to existing methods.
  • This protocol provides a practical advancement in secure quantum cryptographic techniques.
  • The method demonstrates a significant improvement in qubit efficiency and resource management for QPC.