WO2010048879A1

WO2010048879A1 - Method and apparatus for right encryption in set top box

Info

Publication number: WO2010048879A1
Application number: PCT/CN2009/074638
Authority: WO
Inventors: 吴忻; 郑可馨; 周茂林; 李恒
Original assignee: 中兴通讯股份有限公司
Priority date: 2008-10-27
Filing date: 2009-10-27
Publication date: 2010-05-06
Also published as: CN101729750A

Abstract

The invention discloses a method and apparatus for right encryption in a set top box. The set top box configures a parameter for each digital right encryption system. When the set top box is switched on, it obtains the parameter of a current digital right encryption system and transfers the parameter to an initiation interface; the initiation interface initiates corresponding digital right encryption system according to the parameter; a connection interface builds connection with corresponding digital right encryption system server to perform authentication and obtain a decryption key, and transfers the decryption key to a decryption interface; the decryption interface performs program decryption, and transfers the decrypted program to the set top box for playing. Therefore, adaptive encryption of multiple digital rights in the set top box is implemented. With the system and implementation method provided in the invention, the compatibility of a terminal is greatly improved; the resource utilization ratio is raised; the match ability among various service operation systems is improved; the workload for maintaining different versions of digital right management DRM is reduced; and the security of the system is improved.

Description

Method and device for realizing copyright encryption in set top box

Technical field

The present invention relates to the field of multimedia terminals, and in particular, to a method and apparatus for implementing copyright encryption in a set top box.

Background technique

With the development of technology, multimedia terminal products, such as smart phones, PDAs and IPTV (Internet Protocol Television) set-top boxes and other terminal devices will gradually enter thousands of households, becoming an indispensable part of people's lives. As a typical multimedia terminal device, IPTV set-top box greatly meets the needs of users with its rich program source, convenient operation mode and powerful multimedia service function. However, IPTV set-top box is still in the initial stage of development, and it also needs constant perfect.

For IPTV to develop, it will inevitably face the problem of piracy. Video and audio files are easily intercepted by others when they are transmitted over the network. This requires DRM (Digital Right Management), the digital rights management technology of digital copyright encryption system. The purpose of DRM technology is to keep the program encrypted while the network is being uploaded. Even if the encrypted program is downloaded by the user, it will not be played because there is no decrypted key, thus strictly protecting the copyright of the program. For the development of IPTV to be successful, DRM technology is a key, because only in this way can the rights of the author be protected, and the healthy development of the industry can be further promoted, and the network resources will become more and more abundant.

The integration of DRM in IPTV system can be divided into two parts: head-end integration and terminal integration. The integration of the head-end is to combine the DRM encryption system with the IPTV service system. The function is to encrypt the original program and then make it into a program through the business system. Stored in streaming media or sent out as multicast. Terminal integration refers to the process of decrypting a set-top box after it receives an encrypted program over the network.

At present, there are many excellent brands in the field of DRM encryption in the world, and they all have a good market share, but the encryption methods are incompatible. Therefore, in the process of IPTV internationalization development, in order to cope with the different needs of operators when using encryption systems, their terminals are integrated. DRM requires a variety of encryption methods, but for each type of DRM, you need to re-create the version, which will undoubtedly bring a lot of trouble to the version maintenance, will greatly increase the workload, reduce the compatibility of the terminal, and also increase The burden on the operator wastes a lot of resources of the operator. It can be seen that the prior art needs further development.

Summary of the invention

The present invention provides a method and apparatus for implementing copyright encryption in a set top box to solve the defects in the prior art, so that the set top box can target the DRM encrypted program to improve the compatibility of the terminal and improve resource utilization.

In order to solve the above technical problem, the solution of the present invention includes:

The invention provides a method for implementing copyright encryption in a set top box, comprising the following steps:

A. The set top box configures a parameter for each of the plurality of digital copyright encryption systems. When the set top box is powered on, the parameters of the corresponding digital copyright encryption system of the current service system are obtained, and the parameters are transmitted to the initialization interface.

B. The initialization interface initializes a corresponding digital copyright encryption system according to parameters, and the connection interface establishes a connection with the corresponding digital copyright encryption system server, performs authentication, acquires a corresponding decryption key and transmits the same to the decryption interface, and establishes digital copyright. a communication connection between the program encrypted by the encryption system and the decryption interface;

C. The decryption interface decrypts the communication-connected program encrypted by the digital copyright encryption system, and transmits the decrypted program to the decoding module of the set-top box for playing;

Thereby implementing multiple digital copyright encryption adaptations in the set top box.

The implementation method, wherein one of the parameters configured in the set top box in the step A corresponds to a digital copyright encryption system.

The implementation method, wherein one of the parameters configured in the set top box in the step A corresponds to multiple types of digital copyright encryption systems.

The implementation method, wherein a plurality of digital copyright encryption systems are integrated in the set top box in the step A.

The implementation method, where the step A further includes: the set top box parsing the current service The identification field of the corresponding digital rights encryption system of the system determines the type of digital rights encryption system of the current program to be played.

The implementation method, wherein the step B further comprises: determining, by the set top box, whether the digital copyright encryption system of the type is supported, and if not, disconnecting from the current program.

The implementation method, wherein the set top box in the step C plays the decrypted program through the decoding module.

The implementation method, wherein the step C further includes: when the program exits, the disconnect interface disconnects the connection between the program encrypted by the digital encryption system established by the connection interface and the decryption module, And disconnecting the decryption interface from the decoding module of the set top box.

The present invention also provides an apparatus for implementing copyright encryption in a set top box, which includes an initialization interface, a connection interface, and a decryption interface, where

The initialization interface is communicatively coupled to the connection interface, and the connection interface is communicatively coupled to the decryption interface;

The connection interface is configured to acquire a decryption key, transmit the decryption key to the decryption interface, and establish a communication connection between the program encrypted by the digital copyright encryption system and the decryption interface; the decryption interface is set to be Decrypting the program encrypted by the digital copyright protection encryption system, and transmitting the decrypted program to the decoding module of the set top box;

The initialization interface is configured to receive the acquired parameters of the corresponding digital copyright encryption system of the current service system, and selectively initialize the digital copyright encryption system according to the parameters;

Thereby supporting a variety of digital copyright encryption adaptation in the set top box.

Further, in the device, the decryption interface is further configured to be in communication connection with a decoding module in the set top box, wherein the decoding module is configured to play a corresponding program decrypted by the decryption interface.

Further, the device further includes a disconnection interface, wherein the disconnection interface is respectively communicably connected to the connection interface and the decryption interface, and the disconnection interface is configured to be disconnected from the connection interface. The connection between the decryption interface and the program encrypted by the digital copyright encryption system, and the disconnection between the decryption interface and the decoding module in the set top box.

The present invention also provides a set top box comprising the apparatus according to the above described to achieve a plurality of digital copyright encryption adaptations. Further, the set top box may include a plurality of the devices described above.

The invention provides a method and a device for realizing copyright encryption in a set top box, and rationally arranges each interface, so that the set top box can play the DRM encrypted program targetly, thereby greatly improving the compatibility of the terminal and improving the resource utilization rate. , improve the matching ability between various business operation systems, reduce the workload of maintaining different DRM versions, and improve the security of the system. BRIEF abstract

1 is a schematic flow chart of various DRM adaptations in a set top box according to the present invention; and FIG. 2 is a schematic structural view of a plurality of DRM adaptive devices in the set top box of the present invention.

Preferred embodiment of the invention

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The invention provides a method and a device for realizing copyright encryption in a set top box, and rationally arranges each interface so that the set top box can target the DRM encrypted program, thereby realizing multiple digital copyright encryption adaptation in the set top box. It greatly improves the compatibility of the terminal and improves the resource utilization. The adaptation of the multiple DRM encryption modes means that the set top box terminal can simultaneously support multiple DRM decryption functions. When the set top box plays the encrypted program, the set top box obtains the information of the program, and then analyzes the current program. The DRM method is encrypted, and then decrypted and played. The headend encryption device of the digital rights encryption system is an important component of the service system, so the set top box terminal can identify which DRM is encrypted by a program. When the set-top box plays a program, a link of program information is obtained from the service system, and the link includes an identifier field parameter of the DRM type to distinguish different DRM types.

A plurality of digital copyright encryption adaptive devices in the set top box, as shown in FIG. 2, include a connection interface 203, a disconnect interface 204, and a decryption interface 205, wherein the connection interface 203 is communicably connected to the decryption interface 205, The disconnect interface 204 is communicatively coupled to the connection interface 203 and the decryption interface 205, respectively, and the connection interface 203 is configured to acquire a decryption key and establish communication between the program encrypted by the digital copyright encryption system and the decryption interface 205. The decryption interface 205 is configured to decrypt the program encrypted by the digital copyright protection encryption system; the disconnect interface The system is further configured to include at least one initialization interface 201, the initialization interface is communicatively coupled to the connection interface 203, and the initialization interface 201 is configured to selectively initialize the digital copyright encryption system; The decryption interface 205 is communicatively coupled to the decoding module 206 of the set top box, and the decoding module 206 is configured to play a corresponding program; and the present invention integrates multiple DRM encryption systems into the same set top box. It can be seen that the invention greatly improves the compatibility of the terminal and improves the matching capability between the various service operating systems.

The method for implementing the multiple digital copyright encryption adaptation in the set top box includes the following steps: a. The set top box configures one parameter DRMtype for each DRM, acquires the current DRM parameter DRMtype when the set top box is powered on, and transmits the parameter DRMtype. To the initialization interface 201; a parameter DRMtype configured by the set top box for each DRM may correspond to each DRM category, or may be a DRMtype configured by the set top box and correspond to multiple types of DRMs;

The initialization interface 201 initializes the corresponding DRM according to the parameter DRMtype, and the connection interface 203 synchronously establishes a connection with the corresponding DRM server, performs authentication to obtain the decryption key and transmits it to the decryption interface 205;

c. The set top box parses the identifier field of the current DRM to determine the DRM type of the current program, and then determines whether the set top box supports the DRM category. If not, the disconnect interface 204 is disconnected; if yes, Then proceeds to step d;

d. If the set top box supports the DRM category, the decryption interface 205 establishes a decryption connection for program decryption, and transmits the decrypted program to the decoding module 206 in the set top box for playing;

e. If the program is an unencrypted program, the decoding module 206 in the set top box directly plays the program;

f. The disconnected interface 204 disconnects when the DRM encrypted program or the unencrypted program exits.

Through the above process processing, the resource utilization rate is improved, the workload for maintaining different DRM versions is reduced, and the security of the system is improved.

In order to further illustrate the present invention, the set top box is now integrated with three types of h, j and k. The DRM is described as an example. The set top box is a plurality of DRM configuration parameters DRMtypr, and the correspondence between the value of DRMtype and the currently supported DRM type in the set top box is defined as follows: 0 means DRM is not supported; 1 means support h type DRM, 2 means support j type DRM, 3 means support k type DRM, 4 means support h&j, ie support h and j type DRM, 5 means support h&j&k, ie support h, j and k type DRM According to the above rule, the correspondence may be increased according to requirements; as shown in FIG. 1, the process of multiple DRM adaptations in the present invention includes the following steps:

Step 101: Assuming that there are two types of DRMs in the current service system, the DRMtype parameter in the set top box is set to 4, and the set top box is initialized.

Step 102: When the set-top box starts to read the configuration file, the DRMtype value is 4, and the currently supported DRM types are h and j, and the initialization interfaces of h and j in the system are respectively called to initialize the DRM model. Performing authentication with the DRM server while acquiring a key required to decrypt the encrypted program and transmitting it to the decryption interface;

Step 103: When the user plays the program, the set top box obtains the link of the program, analyzes the DRM indication field in the link, and the set top box obtains the encryption type n of the program;

If n=0, indicating that the current program is an unencrypted program, proceed to step 106 to directly play; if n=h, indicating that the current program is a program encrypted by h type DRM, proceed to step 104; if n = j, If the current program is a program encrypted by j type DRM, proceed to step 104; if the value of n is otherwise, proceed to step 107;

Step 104: The system calls the connection interface of the h type to establish a decryption channel with the decryption interface; or the system calls the j type connection interface and the decryption interface to establish a decryption channel;

Step 105: The system decrypts the DRM encrypted program and transmits the decrypted program to the set top box.

Step 106: The decoding module in the set top box decodes and plays the decrypted program.

Step 107: When the user exits playing, the system calls the disconnect interface to disconnect, and closes the decryption channel. Through the processing of the above process, the operator makes full use of the existing resources and improves the security of the system. In summary, the present invention provides a method and apparatus for implementing multiple digital copyright encryption adaptations in a set top box, and rationally and scientifically arranges each interface, so that the set top box can play the DRM encrypted program in a targeted manner, which greatly improves the program. The compatibility of the terminal improves resource utilization, improves the matching ability between various service operating systems, enables the terminal to play various DRM encrypted programs, does not need to make different versions for each DRM encryption method, and reduces maintenance. The workload of different DRM versions; operators can make full use of existing resources, and can use different DRM encryption technologies in the business system to further improve the security of the system.

It should be understood that the above description of the preferred embodiments is not to be construed as limiting the scope of the present invention. In the case of the scope of the invention, it is also possible to make various modifications, such as alternatives, simple combinations, etc., which fall within the scope of the invention, and the scope of the invention should be determined by the appended claims.

Industrial applicability

The invention provides a method and a device for realizing copyright encryption in a set top box, so as to realize a plurality of digital copyright encryption adaptations in the set top box, and rationally arrange each interface so that the set top box can play the DRM encrypted program in a targeted manner. The compatibility of the terminal is improved, the resource utilization rate is improved, the matching capability between the various business operation systems is improved, the workload for maintaining different DRM versions is reduced, and the security of the system is improved.

Claims

Claim

A method for implementing copyright encryption in a set top box, comprising the steps of:

The implementation method according to claim 1, wherein one of the parameters configured in the set top box in the step A corresponds to a digital copyright encryption system.

The implementation method according to claim 1, wherein one of the parameters configured in the set top box in the step A corresponds to a plurality of types of digital copyright encryption systems.

The implementation method according to claim 2 or 3, wherein the plurality of digital copyright encryption systems in the set top box in the step A are integrated.

The implementation method of claim 1, wherein the step A further comprises: the set top box parsing an identifier field of a corresponding digital copyright encryption system of a current service system to determine a type of digital copyright encryption system of a current program to be played. .

The implementation method of claim 1, wherein the step B further comprises: determining, by the set top box, whether the digital copyright encryption system of the type is supported, and if not, disconnecting from the current program.

The implementation method according to claim 1, wherein the set top box plays the decrypted program through the decoding module in the step C.

The implementation method of claim 1, wherein the step C further includes: When the program exits, the disconnect interface disconnects the connection between the program encrypted by the digital encryption system established by the connection interface and the decryption module, and disconnects between the decryption interface and the decoding module of the set top box. connection.

9. A device for implementing copyright encryption in a set top box, comprising: an initialization interface, a connection interface, and a decryption interface, wherein

10. The apparatus according to claim 9, wherein the decryption interface is further configured to be in communication connection with a decoding module in the set top box, wherein the decoding module is configured to play a corresponding program decrypted by the decryption interface.

The device according to claim 9, further comprising a disconnection interface, wherein the disconnection interface is respectively communicably connected to the connection interface and the decryption interface, and the disconnection interface is configured A connection between the decryption interface established by disconnecting the connection interface and a program encrypted by the digital copyright encryption system, and disconnection between the decryption interface and the decoding module in the set top box.

12. A set top box comprising the apparatus of any of claims 9-11 for implementing a plurality of digital rights encryption adaptations.

13. A set top box according to claim 12 comprising a plurality of said devices.