Mechanism to determine source device service tier based on the version of the HDCP key
US8813202B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2012 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | May 5, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/835
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A source device and method for authenticating a sink device. The source device and method include detecting when the sink device connects to a communication interface and in response to detecting a connected sink device, activating a sink device authentication protocol which authenticates whether the connected sink device is an approved sink device for connecting via the communication interface. The source device determines a level of authentication of the connected sink device from among a first-level authentication and a second-level authentication based on first and second authentication components, respectively derived from different master keys, which affects the type of content provided to the sink device. Responsive to the level of authentication provided through the connected sink device, modifying the content transmitted to the connected sink device, and preventing transfer of any content from the source device to the sink device in response to the sink device not being authenticated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.