Secure recording and rendering of encrypted multimedia content
US9971879B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2016 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Dec 8, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An authorized user obtains a packaging license that grants permission to use a particular recording device to generate multimedia content in accordance with specified license terms. The packaging license includes a content key that is used to encrypt the multimedia content at the point of capture on the recording device. The encrypted multimedia content can be transmitted via unsecure channels (for example, via electronic mail) to a networked content repository or an intended recipient. For playback, an authorized user obtains a playback license that grants permission to decrypt and playback the multimedia content using a particular playback device. An authorization server and a key management server are used to manage which users are entitled to receive a license, and to define the terms of the granted licenses. A record of the granted authorizations and licenses is maintained, thereby allowing access to a given content item to be audited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.