Change search
ReferencesLink to record
Permanent link

Direct link
Hacking the Bell test using classical light in energy-time entanglement–based quantum key distribution
Linköping University, Department of Electrical Engineering, Information Coding. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-8032-1466
Stockholm University, Stockholm, Sweden.
Stockholm University, Stockholm, Sweden.
Stockholm University, Stockholm, Sweden.
Show others and affiliations
2015 (English)In: Science Advances, ISSN 2375-2548, Vol. 1, no 11, 1500793Article in journal (Refereed) Published
Abstract [en]

Photonic systems based on energy-time entanglement have been proposed to test local realism using the Bell inequality. A violation of this inequality normally also certifies security of device-independent quantum key distribution (QKD) so that an attacker cannot eavesdrop or control the system. We show how this security test can be circumvented in energy-time entangled systems when using standard avalanche photodetectors, allowing an attacker to compromise the system without leaving a trace. We reach Bell values up to 3.63 at 97.6% faked detector efficiency using tailored pulses of classical light, which exceeds even the quantum prediction. This is the first demonstration of a violation-faking source that gives both tunable violation and high faked detector efficiency. The implications are severe: the standard Clauser-Horne-Shimony-Holt inequality cannot be used to show device-independent security for energy-time entanglement setups based on Franson’s configuration. However, device-independent security can be reestablished, and we conclude by listing a number of improved tests and experimental setups that would protect against all current and future attacks of this type.

Place, publisher, year, edition, pages
2015. Vol. 1, no 11, 1500793
Keyword [en]
Bell’s Theorem; Energy-Time Entanglement; Quantum Hacking; Quantum Key Distribution
National Category
Accelerator Physics and Instrumentation
URN: urn:nbn:se:liu:diva-127721DOI: 10.1126/sciadv.1500793PubMedID: 26824059OAI: diva2:927171
Available from: 2016-05-11 Created: 2016-05-11 Last updated: 2016-06-02

Open Access in DiVA

fulltext(889 kB)33 downloads
File information
File name FULLTEXT01.pdfFile size 889 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Jogenfors, JonathanLarsson, Jan-Åke
By organisation
Information CodingFaculty of Science & Engineering
Accelerator Physics and Instrumentation

Search outside of DiVA

GoogleGoogle Scholar
Total: 33 downloads
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: 85 hits
ReferencesLink to record
Permanent link

Direct link