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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Security of a practical quantum secure direct communication system under weak-randomness basis selection attack.

Fu-Le Hao, Cheng Zhang, Shi-Pu Gu

    Optics Letters
    |April 15, 2026
    PubMed
    Summary
    This summary is machine-generated.

    Imperfections in quantum secure direct communication (QSDC) devices create vulnerabilities. This study introduces a model to quantify security risks from weak-random basis selection attacks, crucial for practical QSDC systems.

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    Area of Science:

    • Quantum Information Science
    • Cybersecurity
    • Applied Physics

    Background:

    • Quantum secure direct communication (QSDC) offers keyless secret message transmission via quantum channels.
    • Device imperfections in QSDC systems introduce security vulnerabilities.
    • Weak-random basis selection attacks exploit manipulated basis selection probabilities to reduce eavesdropping error rates.

    Purpose of the Study:

    • To develop the first general quantitative security analysis model for practical QSDC systems.
    • To analyze the impact of weak-random basis selection attacks on QSDC security.
    • To characterize imperfect basis selection using the parameter epsilon (ε).

    Main Methods:

    • Development of a general quantitative security analysis model for QSDC.
    • Characterization of imperfect basis selection with the parameter epsilon (ε).
    • Simulation of QSDC system performance under varying degrees of basis selection imperfection.

    Main Results:

    • The maximal secure communication distance significantly decreases as epsilon (ε) increases.
    • With ε=0.1, the secure distance drops from 34 km to 24 km.
    • Secure communication becomes impossible (distance reduces to 0) when ε exceeds 0.32.

    Conclusions:

    • Weak-random basis selection attacks pose a significant threat to practical QSDC systems.
    • The developed model highlights the importance of addressing basis selection loopholes for QSDC security.
    • Enhancing practical security of QSDC requires careful consideration of real-world experimental conditions and device imperfections.