Efficient Device-Independent Quantum Key Distribution

Abstract

An efficient protocol for quantum key distribution is proposed the security of which is entirely device-independent and not even based on the accuracy of quantum physics. A scheme of that type relies on the quantum-physical phenomenon of non-local correlations and on the assumption that no illegitimate information flows within and between Alice’s and Bob’s laboratories. The latter can be enforced via the non-signaling postulate of relativity if all measurements are carried out simultaneously enough.