Secure and efficient decoy-state quantum key distribution with inexact pulse intensities

Abstract

We present a general theorem for the efficient verification of the lower bound of single-photon transmittance. We show how to do decoy-state quantum key distribution efficiently with large random errors in the intensity control. In our protocol, the linear terms of fluctuation disappear and only the quadratic terms take effect. We then show the unconditional security of decoy-state method with whatever error pattern in intensities of decoy pulses and signal pulses provided that the intensity of each decoy pulse is less than $\mu$ and the intensity of each signal pulse is larger than ${\mu }^{\prime }$.

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Cited by in corpus (4)

• Decoy State Quantum Key Distribution With Modified Coherent State
• Exact minimum and maximum of yield with a finite number of decoy light intensities
• Effect of detector dead-times on the security evaluation of differential-phase-shift quantum key distribution against sequential attacks
• Decoy states for quantum key distribution based on decoherence-free subspaces