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

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

United Technologies Corporation

Hisilicon Technologies Co., Ltd.

Academy of Broadcasting Science, National Radio and Television Administration

Xiaoxia Guo

Lei Wang

Lei Zhang

Zhifan Sheng

Zhijian Liang

Peiyu Guo

Qiang Wang

Zheng Li

Di Wu

Xingjun Wang

Zhonghua Fang

Dongfei Wang

Method for establishing a trust chain, comprising: requesting a third CA for a third key pair and a third certificate, writing a private key of the third key pair and the third certificate into a security storage area, the third certificate comprising model information of the smart television (SMTV) terminal and information of a public key of the third key pair. The SMTV terminal check its possession of a fourth certificate on every start, generate a unique fourth key pair in absence of a fourth certificate, submit online a public key of the fourth key pair and a unique identification of each SMTV terminal to a fourth CA to request for a fourth certificate, and send along the third certificate and a signature signed on the request with the private key of the third key pair; write the fourth certificate into the security storage area upon receiving the fourth certificate.

Smart television terminal and method for establishing a trust chain therefor

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

Xiaoxia Guo