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341 Scientists just sent unhackable quantum keys across 120 kilometers

ScienceDaily
ScienceDaily · 05/09/2026 19:19 EDT

Scientists have taken a major step toward ultra-secure quantum communication by demonstrating a remarkably stable quantum encryption system that worked across more than 120 kilometers of optical fiber. Using tiny semiconductor quantum dots that emit single particles of light on demand, the team achieved one of the highest secure key rates yet for this type of technology while maintaining continuous operation for over six hours without manual adjustments.

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