Semi device independence of the BB84 protocol

Abstract

The BB84 quantum key distribution protocol is semi device independent in the sense that it can be shown to be secure if just one of the users' devices is restricted to a qubit Hilbert space. Here, we derive an analytic lower bound on the asymptotic secret key rate for the entanglement-based version of BB84 assuming only that one of the users performs unknown qubit POVMs. The result holds against the class of collective attacks and reduces to the well known Shor-Preskill key rate for correlations corresponding to the ideal BB84 correlations mixed with any amount of random noise.

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Cited by in corpus (6)

• Security of device-independent quantum key distribution protocols: a review
• Device-independent quantum key distribution with asymmetric CHSH inequalities
• Experimental demonstration of robust quantum steering
• Device-Independent Quantum Key Distribution Based on Routed Bell Tests
• Evidence-based certification of quantum dimensions
• Joint-measurability and quantum communication with untrusted devices