Key generation device and method
US11444758B2 · kind B2 · utility
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4References
20Claims
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Key dates
| Filing date | May 7, 2020 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Feb 11, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0822
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A key generation method includes modulating a first key to a first light source signal, to obtain a modulated optical signal, splitting the modulated optical signal, to obtain a first sub modulated optical signal and a second sub modulated optical signal, attenuating the first sub modulated optical signal such that a quantity of photons included in each period of the first sub modulated optical signal is less than a preset value, and sending an attenuated first sub modulated optical signal to a receive-end device, and obtaining a second key carried in the second sub modulated optical signal, and storing the second key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.