Watermarking and transferring material
US7962964B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2008 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Sep 24, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A client device for use in a system having a server, the client device including: a receiving device configured to receive information material from the server, the information material containing a reversible modification providing a visually perceptible disturbing effect having been applied to the information material by using an invertible algorithm which uses values generated from one or more keys, and to receive identifying information that distinguishes the information material from other information material available from the server and condition information which defines a predetermined condition that should be met in order for the reversible modification to be reversed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.