Change search
ReferencesLink to record
Permanent link

Direct link
Laser Damage Helps the Eavesdropper in Quantum Cryptography
KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
Show others and affiliations
2014 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 112, no 7, 070503- p.Article in journal (Refereed) Published
Abstract [en]

We propose a class of attacks on quantum key distribution (QKD) systems where an eavesdropper actively engineers new loopholes by using damaging laser illumination to permanently change properties of system components. This can turn a perfect QKD system into a completely insecure system. A proof-of-principle experiment performed on an avalanche photodiode-based detector shows that laser damage can be used to create loopholes. After similar to 1 W illumination, the detectors' dark count rate reduces 2-5 times, permanently improving single-photon counting performance. After similar to 1.5 W, the detectors switch permanently into the linear photodetection mode and become completely insecure for QKD applications.

Place, publisher, year, edition, pages
2014. Vol. 112, no 7, 070503- p.
Keyword [en]
Tailored Bright Illumination, Key Distribution, Avalanche Photodiodes, Security, Mechanisms, Photons, Devices, Attack
National Category
Other Physics Topics
URN: urn:nbn:se:kth:diva-143435DOI: 10.1103/PhysRevLett.112.070503ISI: 000331952500001ScopusID: 2-s2.0-84894494194OAI: diva2:706957

QC 20140324

Available from: 2014-03-24 Created: 2014-03-21 Last updated: 2015-11-30Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Sauge, Sebastien
By organisation
Microelectronics and Information Technology, IMIT
In the same journal
Physical Review Letters
Other Physics Topics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 33 hits
ReferencesLink to record
Permanent link

Direct link