Security of continuous-variable quantum cryptography
- 9 November 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 62 (6) , 062306
- https://doi.org/10.1103/physreva.62.062306
Abstract
We discuss a quantum key distribution scheme in which small phase and amplitude modulations of cw light beams carry the key information. The presence of EPR-type correlations provides the quantum protection. We identify universal constraints on the level of shared information between the intended receiver (Bob) and any eavesdropper (Eve) and use this to make a general evaluation of security. We identify teleportation as an optimum eavesdropping technique.Keywords
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This publication has 17 references indexed in Scilit:
- Quantum cryptography with squeezed statesPhysical Review A, 2000
- Optimal eavesdropping in quantum cryptography. I. Information bound and optimal strategyPhysical Review A, 1997
- Coherent eavesdropping strategies for the four state quantum cryptography protocolPhysics Letters A, 1997
- Quantum-state disturbance versus information gain: Uncertainty relations for quantum informationPhysical Review A, 1996
- Quantum cryptography using any two nonorthogonal statesPhysical Review Letters, 1992
- Quantum cryptography based on Bell’s theoremPhysical Review Letters, 1991
- Quantum Correlations: A Generalized Heisenberg Uncertainty RelationPhysical Review Letters, 1988
- Preparation, measurement and information capacity of optical quantum statesReviews of Modern Physics, 1986
- A Mathematical Theory of CommunicationBell System Technical Journal, 1948
- Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?Physical Review B, 1935