Encryption device and method, and image forming apparatus
US7933406B2 · kind B2 · utility
0Cited by
1References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 18, 2007 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | Feb 23, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/448
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An encryption device which is capable of preparing an encrypted document not easily deciphered by a third person. The encryption device encrypts information formed on a recording member on the basis of a predetermined encryption code. A surface of the recording member is irradiated with light. An image of the irradiated surface of the recording member irradiated with the light is taken. The encryption code is prepared on the basis of the taken image of the irradiated surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.