Beijing Novel-Super Digital Tv Technology Co., Ltd.

Academy of Broadcasting Science, State Administration of Press, Publication, Radio, Film & Television

United Technologies Corporation

Zhijian Liang

Lei Wang

Lei Zhang

Zhifan Sheng

Xiaoxia Guo

Qiang Wang

Zheng Li

Xingjun Wang

Peiyu Guo

Dongfei Wang

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.

Digital rights management (DRM) method and system for intelligent operating system

The present invention provides a conditional access method for an intelligent operating system that comprises a trusted execution environment. A digital TV module acquires all channel messages and a control management message. A media play module distributes a DescramblerId and sends the acquired videoPid, audioPid, casId, ecmPid and emmPid and the descrambler message DescramblerId to a conditional access module. The conditional access module selects a registered conditional access application module according to the casId. The conditional access application module acquires corresponding ecm Data and emm Data from the digital TV module, and sends the ecm Data and emm Data to the conditional access module. The conditional access module sends the messages to a trusted application module. The trusted application module performs parse to acquire EK, EKand ECW. The security chip controls a descrambler corresponding to the DescramblerId to perform descrambling according to the acquired messages.

Conditional access method and system for intelligent operating system

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Beijing, China

Zhijian Liang