Cryptographic system and method that uses excitation spectroscopy
US7330550B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2003 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | Jun 13, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0858
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A cryptographic system includes: a) a light source for generating an excitation light signal; b) a spatial light modulator for encoding the excitation light signal with data; c) a wavelength dispersive element for transforming the excitation light signal into a spectral encoded light signal characterized by relative peak intensities at specific wavelengths; d) an optical detector for generating an information output signal in response to receiving an optical input signal, wherein the information output signal represents spectral and intensity characteristics of the optical input signal; and e) a processor for validating the information output signal if differences between representations of the optical input signal, and representations of the spectral encoded light signal are within predetermined limits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.