Complete security analysis of {quantum key distribution} based on unified model of sequential discrimination strategy
Min Namkung, Younghun Kwon

TL;DR
This paper presents a comprehensive security analysis of multiparty quantum key distribution using a unified sequential discrimination model, demonstrating the possibility of secure key sharing despite eavesdropping and noise effects.
Contribution
It introduces a novel unified model incorporating eavesdropping into sequential discrimination for quantum key distribution, providing security metrics and experimental feasibility analysis.
Findings
Non-zero secret key rate achievable despite eavesdropping.
Success probability of eavesdropping is lower with colored noise than white noise.
Proposed realistic quantum optical experiment supports theoretical results.
Abstract
The quantum key distribution for multiparty is one of the essential subjects of study. Especially, without using entangled states, performing the quantum key distribution for multiparty is a critical area of research. For this purpose, sequential discrimination, which provides multiparty quantum communication and quantum key distribution for {multiple receivers}, has recently been introduced. However, since there is a possibility of eavesdropping on the measurement result of a receiver by an intruder using quantum entanglement, a security analysis for {quantum key distribution} should be performed. {However,} no one has provided the security analysis for {quantum key distribution in view of the sequential scheme} yet. In this work, by proposing a unified model of sequential discrimination including an eavesdropper, we provide the security analysis of {quantum key distribution based on…
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Taxonomy
TopicsQuantum Information and Cryptography · Quantum Mechanics and Applications
