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- W2180483207 abstract "In conventional quantum key distribution (QKD) protocols, the information leak to an eavesdropper is estimated throughthe basic principle of quantum mechanics dictated in the original version of Heisenberg's uncertainty principle. Theamount of leaked information on a shared sifted key is bounded from above essentially by using information-disturbancetrade-off relations, based on the amount of signal disturbance measured via randomly sampled or inserted probe signals.Here we discuss an entirely different avenue toward the private communication, which does not rely on the information disturbancetrade-off relations and hence does not require a monitoring of signal disturbance. The independence of theamount of privacy amplification from that of disturbance tends to give it a high tolerance on the channel noises. Thelifting of the burden of precise statistical estimation of disturbance leads to a favorable finite-key-size effect. A protocolbased on the novel principle can be implemented by only using photon detectors and classical optics tools: a laser, aphase modulator, and an interferometer. The protocol resembles the differential-phase-shift QKD protocol in that bothshare a simple binary phase shift keying on a coherent train of weak pulses from a laser. The difference lies in the use ofa variable-delay interferometer in the new protocol, which randomly changes the combination of pulse pairs to besuperposed. This extra randomness has turned out to be enough to upper-bound the information extracted by theeavesdropper, regardless of how they have disturbed the quantum signal." @default.
- W2180483207 created "2016-06-24" @default.
- W2180483207 creator A5070120466 @default.
- W2180483207 date "2015-10-13" @default.
- W2180483207 modified "2023-10-03" @default.
- W2180483207 title "Establishing security of quantum key distribution without monitoring disturbance" @default.
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- W2180483207 doi "https://doi.org/10.1117/12.2197813" @default.
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