Electronic watermarking method, electronic information distribution system, image filing apparatus and storage medium therefor
US6513118B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1999 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Jan 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3281
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic information distribution system that exchanges data across a network at the least comprises a first entity, including first encryption means, for performing a first encryption process for the original data, a second entity, including management distribution means for, at the least, either managing or distributing the data that are provided by the first encryption process, and including electronic watermark embedding means for embedding an electronic watermark in the data, and a third entity, including second encryption means for performing a second encryption of the data in which an electronic watermark is embedded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.