Efficient quantum key distribution secure against no-signalling eavesdroppers
- 1 August 2006
- journal article
- Published by IOP Publishing in New Journal of Physics
- Vol. 8 (8), 126
- https://doi.org/10.1088/1367-2630/8/8/126
Abstract
By carrying out measurements on entangled states, two parties can generate a secret key which is secure not only against an eavesdropper bound by the laws of quantum mechanics, but also against a hypothetical 'post-quantum' eavesdroppers limited by the no-signalling principle only. We introduce a family of quantum key distribution protocols of this type, which are more efficient than previous ones, both in terms of key rate and noise resistance. Interestingly, the best protocols involve large number of measurements. We show that in the absence of noise, these protocols can yield one secret bit per entanglement bit, implying that the key rates in the no-signalling post-quantum scenario are comparable to the key rates in usual quantum key distribution.Keywords
Other Versions
This publication has 14 references indexed in Scilit:
- Interconversion of nonlocal correlationsPhysical Review A, 2005
- Popescu-Rohrlich Correlations as a Unit of NonlocalityPhysical Review Letters, 2005
- No Signaling and Quantum Key DistributionPhysical Review Letters, 2005
- Nonlocal correlations as an information-theoretic resourcePhysical Review A, 2005
- Efficient Quantum Key Distribution Scheme and a Proof of Its Unconditional SecurityJournal of Cryptology, 2004
- Quantum cryptographyReviews of Modern Physics, 2002
- Quantum cryptography based on Bell’s theoremPhysical Review Letters, 1991
- Wringing out better Bell inequalitiesAnnals of Physics, 1990
- Hidden-Variable Example Based upon Data RejectionPhysical Review D, 1970
- Proposed Experiment to Test Local Hidden-Variable TheoriesPhysical Review Letters, 1969