Continuous-variable quantum key distribution device and method
US11329810B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2020 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | May 8, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0869
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
This application discloses a continuous-variable quantum key distribution (CV-QKD) device and method. The device includes a light source, a modulation unit, a first random number generator, and a processor, where the processor is configured to obtain a first data sequence based on a preset quantity of modulation format symbols, a distribution probability of each symbol, and a first random number sequence generated by the first random number generator, and obtain a second data sequence based on the first data sequence; and the modulation unit is configured to modulate, based on to the first data sequence, a signal emitted by the light source to output a second optical signal, where the second optical signal does not need to include quantum states with a quantity in an order of magnitude of 28×28 required in an existing Gaussian protocol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.