Methods and systems for cryptographic access control of video
US9094733B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2012 |
| Grant date | Jul 28, 2015 |
| Priority date | — |
| Expiry date | Jul 4, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8355
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Cryptographic access control of multimedia video is presented. A method includes generating as metadata an access control policy (ACP) associated with video, the ACP including authorization rules and cryptographic information associated with an encryption policy; encrypting the video according to the encryption policy; and encoding the encrypted video with the authorization rules and the cryptographic information, which may be used to decrypt and render the encoded video. As an example, an authorized receiver device having credentials and/or capabilities matched to the authorization rules may extract the ACP information from the encrypted video and use it to decrypt and properly render the video. The method may further include visually encoding the encrypted video with at least portions of the authorization rules and the cryptographic information, such that the visually encoded video is renderable as the video by an authorized device, but is renderable as visually unintelligible video by an unauthorized device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.