Title:
長距離量子鍵配送
Document Type and Number:
Japanese Patent JP7430926
Kind Code:
B2
Abstract:
A method for quantum key distribution is implementable in a system with a plurality of data processing devices (10, 11). The method comprises: determining, in at least one of a first data processing device (10) and a second data processing device (11), an intrinsic loss along a quantum channel (13) between the first data processing device (10) and the second data processing device (11); generating, in the first data processing device (10), a first signal; generating, in the first data processing device (10), a pulse sequence comprising at least one test pulse and signal pulses generated from the first signal; transmitting the pulse sequence from the first data processing device (10) via the quantum channel (13) to the second data processing device (11); receiving the pulse sequence in the second data processing device (11), and determining, in the second data processing device (11), a second signal from the pulse sequence; determining invalid signal positions and providing the invalid signal positions in the first data processing device (10) and the second data processing device (11); determining, in the first data processing device (10), a first reconciled signal from the first signal and the invalid signal positions, and determining, in the second data processing device (11), a second reconciled signal from the second signal and the invalid signal positions; determining a total loss along the quantum channel (13) from the at least one test pulse received in the second data processing device (11), determining a signal loss from the total loss and the intrinsic loss, and providing the signal loss in the first and the second data processing device (10, 11); determining a shared key in the first and the second data processing device (10,11) by error correcting the first reconciled signal in the first data processing device (10) and error correcting the second reconciled signal in the second data processing device (11); and determining an amplified key in the first and the second data processing device (10, 11) from the shared key by shortening the shared key by a shortening amount that is determined from the signal loss.
Inventors:
Kirsanov Nikita
Kenbayev Nurborat
Kronbari Dormitory
Vinocor Valerie
Resovik Gorday
Sekatsuki Pavel
Thaginaryeva Asher
Kenbayev Nurborat
Kronbari Dormitory
Vinocor Valerie
Resovik Gorday
Sekatsuki Pavel
Thaginaryeva Asher
Application Number:
JP2022022716A
Publication Date:
February 14, 2024
Filing Date:
February 17, 2022
Export Citation:
Assignee:
TERRA QUANTUM AG
International Classes:
H04L9/12; H04B10/70
Domestic Patent References:
| JP2018505599A | ||||
| JP2022061486A |
Foreign References:
| CN109600172A |
Other References:
大崎 正雄 ほか,量子暗号鍵配送におけるスクィズド状態の有効性,第26回情報理論とその応用シンポジウム予稿集,日本,2003年12月15日,第2分冊,p.655-658
Attorney, Agent or Firm:
Hiromori Arai
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