| Open Access SQOUTWavelength-Selected Photon-Number-Splitting Attack
The Wavelength-Selected Photon-Number-Splitting (WSPNS) attack targets quantum key distribution systems using decoy states using a two-way scheme, exploiting the properties of intensity modulators to distinguish between decoy and signal states. By timing the pulse to coincide with the intensity modulator's rising edge, the threat actor (Eve) induces a frequency shift in the pulse. This specificity allows Eve to selectively measure the wavelength of decoy pulses using wavelength division multiplexing (WDM) technology, enabling a subsequent photon number splitting (PNS) attack on the signal pulses without introducing errors.
Literature
| [Jiang2012] | M. Jiang, S. Sun, C. Li, and L. Liang. "Wavelength-selected photon-number-splitting attack against plug-and-play quantum key distribution systems with decoy states" In: Phys. Rev. A 86, 032310. (2012) 10.1103/PhysRevA.86.032310.. |
Technique → Countermeasures
List of countermeasures applicable to this technique.
Items: 2
| Description | Countermeasure |
|---|---|
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Avoid using a two-way QKD scheme. |
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Alice should monitor the arrival times of the signal and reference pulses. |