Quantum noise random number generator
US7284024B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2003 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Mar 7, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A quantum noise random number generator system that employs quantum noise from an optical homodyne detection apparatus is disclosed. The system utilizes the quantum noise generated by splitting a laser light signal using a beamsplitter having four ports, one of which receives one of which is receives the laser light signal, one of which is connected to vacuum, and two of which are optically coupled to photodetectors. Processing electronics process the difference signal derived from subtracting the two photodetector signals to create a random number sequence. Because the difference signal associated with the two photodetectors is truly random, the system is a true random number generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.