Limits RegistryPUBLIC RECORD
Limits RegistryArtur Ekert, then at the University of Oxford, published 'Quantum cryptography based on Bell's theorem' in Physical Review Letters on 5 August 1991. In E91 the parties share entangled photon pairs and use a violation of a Bell inequality to check for eavesdropping — an idea that later grew into device-independent QKD.
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Artur Ekert, then at the University of Oxford, published 'Quantum cryptography based on Bell's theorem' in Physical Review Letters on 5 August 1991. In E91 the parties share entangled photon pairs and use a violation of a Bell inequality to check for eavesdropping — an idea that later grew into device-independent QKD.
The year Artur Ekert proposed quantum key distribution using entangled pairs and Bell-inequality tests to certify security.
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Permanent ID limitsregistry.com/limits/LR-E91-ENTANGLEMENT-BASED-QKD
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Limits Registry. LR-E91-ENTANGLEMENT-BASED-QKD. First entanglement-based quantum key distribution protocol (E91). 2026.