Abstract

Ekert has described a cryptographic scheme in which Einstein-Podolsky-Rosen (EPR) pairs of particles are used to generate identical random numbers in remote places, while Bell's theorem certifies that the particles have not been measured in transit by an eavesdropper. We describe a related but simpler EPR scheme and, without invoking Bell's theorem, prove it secure against more general attacks, including substitution of a fake EPR source. Finally we show our scheme is equivalent to the original 1984 key distribution scheme of Bennett and Brassard, which uses single particles instead of EPR pairs.

Keywords

EPR paradoxCryptographyScheme (mathematics)Quantum cryptographyQuantum key distributionElectron paramagnetic resonanceSubstitution (logic)Bell's theoremPhysicsComputer scienceQuantum mechanicsDiscrete mathematicsMathematicsTheoretical physicsQuantumQuantum informationQuantum entanglementComputer securityMathematical analysis

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Related Publications

Quantum cryptography based on Bell’s theorem

Artur Ekert

Practical application of the generalized Bell's theorem in the so-called key distribution process in cryptography is reported. The proposed scheme is based on the Bohm's version...

1991 Physical Review Letters 10250 citations

Publication Info

Year
1992
Type
article
Volume
68
Issue
5
Pages
557-559
Citations
2344
Access
Closed

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Charles H. Bennett, Gilles Brassard, N. David Mermin (1992). Quantum cryptography without Bell’s theorem. Physical Review Letters , 68 (5) , 557-559. https://doi.org/10.1103/physrevlett.68.557

Identifiers

DOI
10.1103/physrevlett.68.557