Countering detector manipulation attacks in quantum communication through detector self-testing

• URL: http://arxiv.org/abs/2204.06155v2
• Date: Tue, 31 May 2022 13:39:16 GMT
• Title: Countering detector manipulation attacks in quantum communication through detector self-testing
• Authors: Lijiong Shen and Christian Kurtsiefer
• Abstract summary: A vulnerability in single-photon detectors to blinding attacks has been one of the biggest concerns. We present a countermeasure based on self-testing of detectors to confirm their intended operation.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In practical quantum key distribution systems, imperfect physical devices open security loopholes that challenge the core promise of this technology. Apart from various side channels, a vulnerability of single-photon detectors to blinding attacks has been one of the biggest concerns, and has been addressed both by technical means as well as advanced protocols. In this work, we present a countermeasure against such attacks based on self-testing of detectors to confirm their intended operation without relying on specific aspects of their inner working, and to reveal any manipulation attempts. We experimentally demonstrate this countermeasure with a typical InGaAs avalanche photodetector, but the scheme can be easily implemented with any single photon detector.

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