公开(公告)号：US20180367829A1

公开(公告)日：2018-12-20

申请号：US15781141

申请日：2016-12-01

Applicant: Academy of Broadcasting Science, State Administration of Press, Publication, Radio, Film ,  Unitend Technologies Inc.

Inventor： Zhifan SHENG ,  Xingjun WANG ,  Lei WANG ,  Zhijian LIANG ,  Peiyu GUO ,  Xiaoxia GUO

IPC: H04N21/254 ,  H04N21/266

Abstract: Disclosed is a method for implementing a digital rights management-enabled media gateway. The media gateway comprises a trusted execution environment and a trusted application configured therein. The method comprises: acquiring a videoPid, an audioPid, a casId, an ecmPid, and an emmPid of a program; parsing the ecmPid and the emmPid using a parsing mechanism that matches the casId, obtaining encryption level keys EK1 and EK2 and an encryption control word ECW; descrambling the scrambled program data stream using the EK1, EK2, ECW, videoPid and audioPid of the program; generating a content encryption key CEK by the trusted application, encrypting the descrambled program data using the CEK and transmitting the same to the terminal; acquiring a public key from the terminal, encrypting the CEK with the public key by the trusted application to obtain an encrypted content encryption key ECEK and transmitting the ECEK to the terminal.

公开(公告)号：US10685094B2

公开(公告)日：2020-06-16

申请号：US15781143

申请日：2016-12-01

Applicant: Academy of Broadcasting Science, State Administration of Press, Publication, Radio, Film & Television ,  Unitend Technologies Inc. ,  BEIJING NOVEL-SUPER DIGITAL TV TECHNOLOGY CO., LTD

Inventor： Zhifan Sheng ,  Xingjun Wang ,  Lei Wang ,  Zhijian Liang ,  Xiaoxia Guo ,  Jing Zhang ,  Peiyu Guo

IPC: H04L29/06 ,  G06F21/10 ,  H04N21/254 ,  G06F21/12 ,  H04L9/08 ,  G06Q20/12 ,  G06F9/455

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.

公开(公告)号：US20180352281A1

公开(公告)日：2018-12-06

申请号：US15781142

申请日：2016-12-01

Applicant: Academy of Broadcasting Science, State Administration of Press, Publication, Radio, Film ,  BEIJING NOVEL-SUPER DIGITAL TV TECHNOLOGY CO., LTD ,  UNITEND TECHNOLOGIES INC.

Inventor： Zhifan SHENG ,  Qiang WANG ,  Jing ZHANG ,  Zheng LI ,  Lei WANG ,  Zhijian LIANG ,  Xiaoxia GUO ,  Dongfei WANG

IPC: H04N21/418 ,  H04N21/4405 ,  H04N21/266

CPC classification number: H04N21/4181 ,  H04N21/26606 ,  H04N21/418 ,  H04N21/4405

Abstract: 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 EK1, EK2 and ECW. The security chip controls a descrambler corresponding to the DescramblerId to perform descrambling according to the acquired messages.

公开(公告)号：US20160259921A1

公开(公告)日：2016-09-08

申请号：US14639656

申请日：2015-03-05

Applicant: Unitend Technologies Inc.

Inventor： Xinjun WANG ,  Zhijian LIANG ,  Hongbing MEI

IPC: G06F21/10 ,  G06F21/60

CPC classification number: G06F21/105 ,  G06F2221/0766 ,  G06F2221/0768

Abstract: The present invention provides a method for packaging content rights, wherein the relationship of a content, an object and a right are described and bound by using a data structure with an tag so as to describe the content rights. By adopting the method for packaging content rights provided by the present invention, the interoperability is strong, meanwhile, the content rights can be defined flexibly, thereby ensuring that the method has good expansibility; in addition, the content rights are described by a binary system to improve the storage efficiency of the content rights and reduce the occupied system resources, thus ensuring that the method is suitable for hardware processing, and the method is a simple, convenient, efficient, flexible and extensible method for describing the content rights.

Abstract translation: 本发明提供了一种用于打包内容权限的方法，其中通过使用具有标签的数据结构来描述和约束内容，对象和权限的关系，以便描述内容权限。 通过采用本发明提供的封装内容权限的方法，互操作性强，同时可以灵活定义内容权限，从而确保该方法具有良好的可扩展性; 另外，内容权限由二进制系统描述，以提高内容权限的存储效率，减少占用的系统资源，从而确保该方法适用于硬件处理，该方法简单，方便，高效， 灵活可扩展的方法来描述内容权限。