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<p>Coherent state quantum cryptography protocols are of interest due to their easy implementation. However, the security proof of such protocols against all attacks can be tricky because of the attenuation in the communication channel that can be exploited by an eavesdropper. In this work, an attack on the subcarrier wave quantum cryptography protocol has been built, which generalizes the photon number splitting attack. The efficiency of the attack has been analyzed, in particular, for the case where the eavesdropper does not have quantum memory.</p>

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Generalization of a Photon Number Splitting Attack and the Efficiency of Its Application to a Subcarrier Wave Quantum Cryptography Protocol

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月1日

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  • D. A. Kronberg

摘要

Coherent state quantum cryptography protocols are of interest due to their easy implementation. However, the security proof of such protocols against all attacks can be tricky because of the attenuation in the communication channel that can be exploited by an eavesdropper. In this work, an attack on the subcarrier wave quantum cryptography protocol has been built, which generalizes the photon number splitting attack. The efficiency of the attack has been analyzed, in particular, for the case where the eavesdropper does not have quantum memory.