Patent · US Active

Encrypted content streaming

US9071421B2 · kind B2 · utility

3Cited by

3References

19Claims

0Family size

Assignee

MICROSOFT TECHNOLOGY LICENSING, LLC · US

Inventors

Adrian J. Oney · Woodinville, US
Quintin S. Burns · Fort Mill, US
Bryan Born · Snohomish, US

Key dates

Filing date	Dec 15, 2010
Grant date	Jun 30, 2015
Priority date	—
Expiry date	Nov 23, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/603
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Encrypted content streaming is provided by a method comprising holding an encrypted content stream that is cryptographically encrypted from a content stream with a content key, and holding an encrypted content key that is cryptographically encrypted from the content key with one or more intermediate encryption keys. The method further comprises serving the encrypted content stream to a plurality of content consumption devices, wherein the encrypted content stream is embedded with a leaf license comprising the encrypted content key, and wherein the encrypted content stream is cryptographically decryptable by a content consumption device having a scalable root license providing one or more intermediate root keys from which the content consumption device derives the one or more intermediate decryption keys paired to the one or more intermediate encryption keys.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.