QKD with classical bit encryption
US7620182B2 · kind B2 · utility
15Cited by
10References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2004 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Mar 23, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/065
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for enhancing the security of a quantum key distribution (QKD) system having QKD stations Alice and Bob. The method includes encrypting key bits generated by a true random number generator (TRNG) and sent to a polarization or phase modulator to encode weak optical pulses as qubits to be shared between Alice and Bob. Key bit encryption is achieved by using a shared password and a stream cipher. Bob obtains at least a subset of the original key bits used by Alice by utilizing the same stream cipher and the shared password.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.