Quantum cryptography protocol
US7359513B2 · kind B2 · utility
7Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2003 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Nov 12, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0852
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for implementing a quantum cryptography system encoding bit values on approximations of elementary quantum systems with provable and absolute security against photon number splitting attacks. The emitter encodes the bit values onto pairs of non-orthogonal states belonging to at least two sets, and such that there does not exist a single quantum operation allowing to reduce the overlap of the states in all the sets simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.