safety security
Discrete-Modulated QKD Produced General-Attack Keys in Real Time
A near-commercial pipeline generated composable keys from finite blocks of roughly one million rounds.
Summary
A near-commercial pipeline generated composable keys from finite blocks of roughly one million rounds.
Discrete modulation can make continuous-variable quantum key distribution practical for telecom hardware, but finite-size composable security against general attacks has been difficult to demonstrate. This quadrature phase-shift-keying system uses a variable-length security framework built on entropy accumulation and conic optimization. The experiment reports the first real-time DM-CVQKD implementation to generate composable secret keys against general attacks with blocks on the order of one million rounds. The result is an experimental pipeline, not a blanket security claim for existing commercial links.
Why it matters
A near-commercial pipeline generated composable keys from finite blocks of roughly one million rounds.
Limits and context
- The result is an experimental pipeline, not a blanket security claim for existing commercial links.
Key claims
A near-commercial pipeline generated composable keys from finite blocks of roughly one million rounds.
Qualification: The result is an experimental pipeline, not a blanket security claim for existing commercial links.
Evidence: source-2026-09-18-014
Sources
- arXiv preprint 2609.20596arXiv · primary research
Corrections
No corrections have been recorded for this story.