Multiparty Quantum Private Comparison Using Rotation Operations

Axioms, Journal Year: 2025, Volume and Issue: 14(4), P. 274 - 274

Published: April 3, 2025

This paper presents a multiparty quantum private comparison (MQPC) protocol that facilitates multiple users to compare the equality of their inputs while preserving confidentiality each input through principles mechanics. In our approach, initially convert secret integers into binary representations, which are then encoded single photons act as carriers information. These single-photon states undergo encryption via rotational operations, effectively obscuring original before transmission semi-honest third party (TP). The TP decrypts and conducts Z-basis measurements derive results. To enhance security, incorporates decoy photons, enabling participants detect potential eavesdropping on channel. Importantly, even if or other attempt glean insights other’s inputs, operations ensures information remains inaccessible. demonstrates significant advancements in practicality compared existing MQPC frameworks rely complex technologies, such entanglement swapping multi-particle entanglement. By leveraging simplicity rotation measurements, is more accessible for implementation.

Language: Английский

Quantum Private Comparison Based on Four-Particle Cluster State

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(22), P. 10759 - 10759

Published: Nov. 20, 2024

A quantum private comparison (QPC) protocol enables two parties to securely compare their data without disclosing the actual values one another, utilizing mechanics maintain confidentiality. Many current QPC protocols mainly concentrate on comparing equality of information between users during a single execution, which restricts scalability. To overcome this limitation, we present an efficient aimed at evaluating groups in execution. This is achieved by leveraging entanglement correlations each particle four-particle cluster state. In our approach, encode using bit flip or phase shift operators sequence they receive, then sent back semi-trusted party determines whether secrets are equal and communicates results users. By employing method facilitating distributed transmission sequence, achieves qubit efficiency 50%. Security analyses reveal that neither external attacks nor insider threats can successfully compromise confidentiality data.

Language: Английский