Binding of protected video content to video player with block cipher hash
US8879731B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 2011 |
| Grant date | Nov 4, 2014 |
| Priority date | — |
| Expiry date | Dec 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/6582
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video player sends a video content identifier and a video player identifier through a network to a server. The video content identifier identifies video content. The video player identifier identifies the video player. Further, a first subset of encrypted video content and an initialization vector are received from a server. In addition, a hash of the video player identifier is generated. The first subset of the encrypted video content is decrypted with a decryption key to generate a first result. Further, a first operation on the initialization vector and the hash is performed to generate a second result. In addition, a second operation is performed on the first result and the second result to generate a first subset of plaintext of video content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.