Certificate handling for digital rights management system
US6513117B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1998 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Dec 20, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2115
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A delivery system for managing security keys uses three key pairs to establish, register, move and revoke rights in a device to view protected information. The first and second key pairs cooperate to establish a secure certificate containing a device public and private key, and the pairs of keys are manipulated to install the appropriate keys in the device and the associated authentication server without ever exposing the keys. Thereafter, in the event of a need to authorize a new device to view content associated with a prior, authorized device, the key pairs are used to revoke the rights of an old device and establish identical viewing rights in the new device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.