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Dead Time Correlation Attack
The Dead Time Correlation Attack leverages the inherent dead time of Avalanche Photodiodes (APDs) (but can be generalised to all Single-Photon Detectors) in QKD systems to induce correlations or anti-correlations in the sifted key, especially under high detection rate conditions. This manipulation occurs because when one APD is inactive due to dead time, only the active APDs can detect photons, leading to predictable patterns in the key generation process.
Literature
[Rogers2007] | D. Rogers, J. Bienfang, A. Nakassis, H. Xu, and C. Clark. "Detector dead-time effects and paralyzability in high-speed quantum key distribution" In: New J. Phys. 9, 19. (2007) 10.1088/1367-2630/9/9/319. |
[Xu2006] | H. Xu, L. Ma, J. Bienfang, and X. Tang. "Infuence of avalanche-photodiode dead time on the security of high-speed quantum-key distribution systems" In: Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, Long Beach, CA, pp. 1-2. (2006) 10.1109/CLEO.2006.4628713. |
Technique → Countermeasures
List of countermeasures applicable to this technique.
Items: 2
Description | Countermeasure |
---|---|
Consider an advanced protocol such as MDI-QKD or DI-QKD. |
|
Employ SPD's dead time management. |