Electronic watermark system electronic information distribution system and image filing apparatus
US6425081B1 · kind B1 · utility
264Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1998 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Aug 14, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3281
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is an electronic watermark method, used for a network, comprising a plurality of entities, wherein provided weparately are an entity for embedding an electronic watermark in encrypted data that are exchanged by said plurality of entities, and an entity for performing an encryption process and a corresponding decryption process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.