Efficient key hierarchy for delivery of multimedia content
US9565171B2 · kind B2 · utility
0Cited by
7References
19Claims
0Family size
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Key dates
| Filing date | May 7, 2012 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Dec 6, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/603
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A Digital Rights Management (DRM) system provides a lightweight layering of encryption and decryption of keys that allows efficient use of different cryptographic techniques to effect the secure delivery of multimedia content. Asymmetric cryptography, where a public key is used to encrypt information that can only be decrypted by a matched private key, is used by the DRM system to deliver symmetric keys securely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.