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Recent advances in quantum key distribution (QKD) systems for optical networks are presented including a system that is compatible with dynamic reconfiguration of the quantum channel using optical switches
We report on a new physical layer optical encryption approach based on quantum noise limited optical signals and M-ary optical phase shift keying that operates at high data rates. In contrast to established encryption methods that rely solely on deterministic algorithms, this system utilizes quantum noise to realize a randomized cipher. Keyed M-ary optical phase modulation is used to encrypt quantum-noise...
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