Delivery of license information using a short messaging system protocol in a closed content distribution system
US7779482B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2003 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Jan 5, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/603
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Delivery of licenses in a closed distribution system including a playback device and secure processor. The secure processor allows only use of authorized content, and the playback device is authorized to execute content. A user requests a license to selected content using a communication link, without the playback device, outside the closed content system to a license server. The user requests licenses using SMS, sending small amounts of information, possibly including proofs of purchase. The server responds using SMS, providing the user with a code representing information interpretable as a license, such as an encrypted content key or a shared secret known to the user. The user, using a keypad or other device, inputs that code to the playback device, which determines if it authorizes use of the content. The playback device authenticates the license, determining whether that license authorizes the user for the content, and enforces the licensed rights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.