Analytical finite-key security proof for decoy-state QKD that incorporates state-preparation flaws, bit/basis side-channel leakage and correlations, intensity fluctuations, and detection-efficiency mismatches.
Security of decoy-state quantum key distribution with correlated bit-and-basis encoders
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abstract
Practical quantum key distribution (QKD) modulators inevitably introduce correlations, causing the state emitted in a given round to depend on the setting choices made in previous rounds. These correlations break the round-by-round independence structure on which many widely used security proof techniques rely, leaving a significant gap between available theoretical guarantees and the reality of practical implementations. In this work, we develop a finite-key security proof for decoy-state BB84 against general coherent attacks that rigorously incorporates correlations introduced by Alice's bit-and-basis encoder, while requiring only partial characterization of such correlations.
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quant-ph 2years
2026 2verdicts
UNVERDICTED 2roles
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A numerical framework proves finite-key security for practical decoy-state QKD systems with transmitter and receiver imperfections including non-IID signals.
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Finite-key security analysis of decoy-state QKD with source and detector imperfections
Analytical finite-key security proof for decoy-state QKD that incorporates state-preparation flaws, bit/basis side-channel leakage and correlations, intensity fluctuations, and detection-efficiency mismatches.
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Numerical security analysis for practical quantum key distribution
A numerical framework proves finite-key security for practical decoy-state QKD systems with transmitter and receiver imperfections including non-IID signals.