Setting best practice criteria for self-differencing avalanche photodiodes in quantum key distribution
| Autor: | Seb J. Savory, Andrew W. Sharpe, George Roberts, Marco Lucamarini, Alexander Koehler-Sidki, James F. Dynes, Andrew J. Shields, Zhiliang Yuan |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Physics::Instrumentation and Detectors Detector 02 engineering and technology Quantum key distribution 021001 nanoscience & nanotechnology Avalanche photodiode 01 natural sciences 010309 optics 0103 physical sciences Key (cryptography) Electronic engineering Automatic gain control 0210 nano-technology Sensitivity (electronics) Electronic circuit Vulnerability (computing) |
| Zdroj: | Quantum Information Science and Technology III. |
| DOI: | 10.1117/12.2275675 |
| Popis: | In recent years, the security of avalanche photodiodes as single photon detectors for quantum key distribution has been subjected to much scrutiny. The most prominent example of this surrounds the vulnerability of such devices to blinding under strong illumination. We focus on self-differencing avalanche photodiodes, single photon detectors that have demonstrated count rates exceeding 1 GCounts/s resulting in secure key rates over 1 MBit/s. These detectors use a passive electronic circuit to cancel any periodic signals thereby enhancing detection sensitivity. However this intrinsic feature can be exploited by adversaries to gain control of the devices using illumination of a moderate intensity. Through careful experimental examinations, we define here a set of criteria for these detectors to avoid such attacks. |
| Databáze: | OpenAIRE |
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