System and method for protecting conventional quantum key distribution protocols
US11831765B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 2021 |
| Grant date | Nov 28, 2023 |
| Priority date | — |
| Expiry date | May 6, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0855
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system with methods to enhance key strength for a quantum shared key which is derived by a conventional quantum key distribution protocol and the system provides a single optical communication channel with security protection mechanism for key distribution without relying on an authenticated public classical channel. The system is implemented with technology in combination of key-strength enhancement, re-encoding operation, density-matrix verification, and grating control for a single optical communication channel where the system can be integrated with a conventional Quantum-Key-Distribution protocol such as BB84 or B92, but excluding GHz-clocked QKD system. Thereby, the system can help a known QKD system to overcome current drawbacks of an apparatus implemented over a conventional QKD protocol so as to derive an enhanced quantum shared key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.