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A Classical-Light A...
A Classical-Light Attack on Energy-Time Entangled Quantum Key Distribution, and Countermeasures
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- Jogenfors, Jonathan, 1988- (author)
- Linköpings universitet,Informationskodning,Tekniska högskolan
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- Larsson, Jan-Åke, Docent (thesis advisor)
- Linköpings universitet,Informationskodning,Tekniska högskolan
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- Vistnes, Arnt Inge, Dr. (opponent)
- Universitetet i Oslo, Norway
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(creator_code:org_t)
- ISBN 9789175191188
- 2015-02-18
- English 60 s.
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Series: Linköping Studies in Science and Technology. Thesis, 0280-7971 ; 1709
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Abstract
Subject headings
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- Quantum key distribution (QKD) is an application of quantum mechanics that allowstwo parties to communicate with perfect secrecy. Traditional QKD uses polarization of individual photons, but the development of energy-time entanglement could lead to QKD protocols robust against environmental effects. The security proofs of energy-time entangled QKD rely on a violation of the Bell inequality to certify the system as secure. This thesis shows that the Bell violation can be faked in energy-time entangled QKD protocols that involve a postselection step, such as Franson-based setups. Using pulsed and phase-modulated classical light, it is possible to circumvent the Bell test which allows for a local hidden-variable model to give the same predictions as the quantum-mechanical description. We show that this attack works experimentally and also how energy-time-entangled systems can be strengthened to avoid our attack.
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- Quantum Key Distribution
- Energy-Time Entanglement
- Quantum Information
- Kvantkryptering
- Energi-Tid-Snärjning
- Kvantinformation
Publication and Content Type
- vet (subject category)
- lic (subject category)
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