The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2020
Filed:
Dec. 01, 2016
Academy of Broadcasting Science, State Administration of Press, Publication, Radio, Film & Television, Beijing, CN;
Unitend Technologies Inc., Beijing, CN;
Beijing Novel-super Digital Tv Technology Co., Ltd, Beijing, CN;
Zhifan Sheng, Beijing, CN;
Xingjun Wang, Beijing, CN;
Lei Wang, Beijing, CN;
Zhijian Liang, Beijing, CN;
Xiaoxia Guo, Beijing, CN;
Jing Zhang, Beijing, CN;
Peiyu Guo, Beijing, CN;
Abstract
A digital rights management (DRM) method for an intelligent operating system comprises: acquiring a play list of media data to be played and encrypted media data; inquiring and acquiring one or more DRM application modules, wherein the DRM application module contains an identifier of a trusted application module; requesting DRM authorization by the DRM application module from a DRM server, judging a content permission and acquiring an encrypted content encryption key (ECEK) and transmitting the ECEK to a TEE; after judging that the content permission is legitimate; decrypting the ECEK acquired by the trusted application module which is in the TEE and corresponds to the trusted application module identifier to acquire a content encryption key (CEK), and decrypting the encrypted media data by using the CEK; and storing the decrypted media data in a security cache region for decoding and outputting.