Method for interdependently validating a digital content package and a corresponding digital license
US6973444B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2000 |
| Grant date | Dec 6, 2005 |
| Priority date | — |
| Expiry date | Jan 13, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/101
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for a device to interdependently validate a digital content package having a piece of digital content in an encrypted form, and a corresponding digital license for rendering the digital content. A first key is derived from a source available to the device, and a first digital signature is obtained from the digital content package. The first key is applied to the first digital signature to validate the first digital signature and the digital content package. A second key is derived based on the first digital signature, and a second digital signature is obtained from the license. The second key is applied to the second digital signature to validate the second digital signature and the license.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.