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Optimal eavesdropping in semi-quantum key distribution
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DOI：10.1016/j.physleta.2025.131174.png)
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Abstract
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Semi-quantum key distribution protocols enable two parties to establish a secret and secure key using a bidirectional quantum channel, providing Eve with a larger attack strategy space. In this paper we study the optimal eavesdropping strategy with three-dimensional systems, when eavesdropping occurs in both directions of the communication channel. We show that the bidirectional interception strategy allows the eavesdropper to extract a greater amount of information compared to the unidirectional interception strategy.
Keywords:
Semi-quantum key distribution
Optimal eavesdropping
Quantum cryptography
Three-dimensional systems
Two-way quantum channel
Journal
IF:
2.6
Papers:
501
Citations:
2.9W