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Journal Article

Sequential attacks against differential-phase-shift quantum key distribution with weak coherent states

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Curty,  Marcos
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Luetkenhaus,  Norbert
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Curty, M., Zhang, L. L., Lo, H.-K., & Luetkenhaus, N. (2007). Sequential attacks against differential-phase-shift quantum key distribution with weak coherent states. QUANTUM INFORMATION & COMPUTATION, 7(7), 665-688.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6D1E-E
Abstract
We investigate limitations imposed by sequential attacks on the performance of differential-phase-shift quantum key distribution protocols that use pulsed coherent light. In particular, we analyze two sequential attacks based on unambiguous state discrimination and minimum error discrimination, respectively, of the signal states emitted by the source. Sequential attacks represent;I special type of intercept-resend attacks and, therefore, they provide ultimate upper bounds on the maximal distance achievable by quantum key distribution schemes.