Countermeasure against blinding attacks on low-noise detectors with a background-noise-cancellation scheme

Title
Countermeasure against blinding attacks on low-noise detectors with a background-noise-cancellation scheme
Authors
문성욱한상욱김용수박창훈이민수박병권우민기
Keywords
QKD; APS; Quantum hacking; Low noise; Background noise
Issue Date
2016-12
Publisher
Physical review. A
Citation
VOL 94, NO 6-062321-10
Abstract
We developed a countermeasure against blinding attacks on low-noise detectors with a background-noisecancellation scheme in quantum key distribution (QKD) systems. Background-noise cancellation includes selfdifferencing and balanced avalanche photon diode (APD) schemes and is considered a promising solution for low-noise APDs, which are critical components in high-performance QKD systems. However, its vulnerability to blinding attacks has been recently reported. In this work, we propose a countermeasure that prevents this potential security loophole from being used in detector blinding attacks. An experimental QKD setup is implemented and various tests are conducted to verify the feasibility and performance of the proposed method. The obtained measurement results showthat the proposed scheme successfully detects occurring blinding-attack-based hacking attempts.
URI
http://pubs.kist.re.kr/handle/201004/65243
ISSN
2469-9926
Appears in Collections:
KIST Publication > Article
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