CN101256611B - Method for implementing digital copyright management protection in Java application - Google Patents

Abstract

The invention discloses a method for realizing digital rights management and protection in Java applications, and relates to the field of digital rights management and protection of Java applications. The method comprises the following steps: A1, presetting the Java application descriptor file, which contains digital rights management information; A2, when the Java application starts, first parsing the Java application descriptor file to obtain the digital rights management information, performing digital rights management protection on the Java application. By adopting the above scheme, the present invention solves the problem of realizing DRM protection in various Java applications by adding DRM attributes in the JAD file; and, for mobile phones that do not support the DRM function, also realizes copyright control of JAVA applications.

Description

A Method of Realizing Digital Rights Management Protection in Java Application

technical field

The present invention relates to the digital rights management protection of Java application, especially, a kind of by adding DRM (Digital Rights Management, digital rights management) attribute in JAD (Java Application Descriptor, Java Application Program Descriptor) file, in Java application A method for realizing digital rights management protection in the Internet.

Background technique

Java technology has become the standard for smartphone software platforms. People who write applications and provide services do not need to care about the operating system and chips used by the mobile phones that receive their services, as long as they write programs according to the requirements of Java; similarly, manufacturers of mobile phones There is no need to worry about who will provide value-added services in the future. Therefore, using Java technology, a complete and efficient wireless data value-added service industry chain can be established, thereby providing users with flexible, personalized, and diverse services.

At present, the basic Java platform adopted by the Java mobile phone software platform is CLDC (Connected Limited Device Configuration, limited connection device configuration) and MIDP (Mobile Information Device Profile, mobile information device description), which belongs to J2ME (Java 2 Micro Edition, the pocket version of the Java 2 platform, also known as Micro version or lite version), commonly known as "Wireless Java" technology, the official name of SUN is KVM (The K Virtual Machine, K virtual machine).

KVM, or J2ME, is Sun's Java software for embedded devices, which can provide mobile phone users with services such as games, personal information processing, electronic maps, and stocks. J2ME is a solution dedicated to consumer products and embedded devices. It generally divides all embedded devices into two types: one is embedded devices with limited computing functions and limited power supply, such as PDAs, mobile phones, etc.; The other type is an embedded device with relatively good computing power and relatively sufficient power supply, such as air conditioners and refrigerators. Because of these two distinctions, Java introduced the concept of Configuration (configuration), and defined the above-mentioned embedded devices with limited computing functions and limited power in the CLDC specification; another device specification was CDC (ConnectedDevice Configuration, connected device configuration) specifications. In other words, J2ME divides all embedded devices into two abstract types using the concept of Configuration.

DRM (Digital Rights Management, digital rights management) is a technology developed with the widespread dissemination of electronic audio and video programs on the Internet. Its working principle is: first establish a digital program authorization center to encode the compressed digital program content , and then use the key to encrypt and protect the content, and the encrypted digital program header stores the KeyID and the URL (Uniform Resource Location, Uniform Resource Locator) address of the program authorization center. When the user orders, according to the KeyID and URL information at the head of the program, after passing the verification and authorization of the digital program authorization center, the relevant key is sent for decryption, and then the program can be played. In the implementation of DRM, according to the copyright object and the way the packaged download content is sent to the user's mobile terminal, it can generally be divided into three types: forward-lock (forwarding prohibition), combined delivery (combined delivery) and separate delivery (separate delivery). .

However, many of the Java applications that can be downloaded at present are Java applications promoted by operators on their own networks; therefore, in some cases, the current DRM2.0 cannot satisfy or is difficult to implement; for example, operators provide users with Trial Java games, etc., or operators set different usage permissions for various Java applications according to different paying users, or control Java applications such as usage interval, usage duration, and deletion of attributes.

Moreover, the current DRM2.0 also requires that the mobile phone must support the DRM function, otherwise the copyright control of JAVA applications cannot be realized.

Therefore, there are defects in the prior art and need to be improved.

Contents of the invention

The technical problem to be solved by the invention is how to realize DRM protection in various Java applications, and how to realize copyright control of JAVA applications in mobile phones that do not support the DRM function.

Technical scheme of the present invention is as follows:

A method for realizing digital rights management protection in a Java application, comprising the following steps: A1, presetting the Java application program descriptor file, which contains digital rights management information; A2, when the Java application is started, first parsing the Java application The program descriptor file acquires the digital rights management information and executes the digital rights management protection for the Java application.

The method, wherein, in step A1, the DRM information is set as a DRM attribute list.

The method described above, wherein the digital rights management information includes at least one of the following items: forwarding prohibition, usage times limitation, usage date limitation, usage interval limitation, usage duration limitation.

The method described above, wherein, after step A2 acquires the digital rights management information, the following step is also performed: judging whether the digital rights management information includes at least one of the following items: prohibition of forwarding, limit on number of times of use, limit on date of use, Use interval limitation, use duration limitation, if so, implement digital rights management protection for the Java application according to various digital rights management information.

The method described above, wherein, after step A2, the following steps are also performed: A301, when the Java application is started repeatedly, according to the digital rights management information, it is judged whether to continue to execute the Java application, otherwise, A302 is performed; A302, prompting the user whether to delete The JAVA application; A303. Determine whether the user's feedback agrees to delete, and if yes, delete the JAVA application.

The method described above, wherein the digital rights management information also includes automatic deletion information; and, after step A2 obtains the digital rights management information, the following steps are also performed: A21, judging whether the digital rights management information is automatic deletion information, if yes, execute A22; A22, automatically delete the JAVA application.

In the above method, the following steps are performed before step A22: prompting the user whether to delete the JAVA application, and judging whether the user's feedback information agrees to delete, and if yes, perform step A22.

The method, wherein, after step A2, the following steps are further performed: A3. According to the result of the digital rights management protection, it is judged whether to continue to execute the Java application.

Said method, wherein, step A2 is performed in a device conforming to the device configuration of limited connection.

Said method, wherein, step A2 is executed in the mobile phone.

By adopting the above scheme, the present invention solves the problem of realizing DRM protection in various Java applications by adding DRM attributes in the JAD file; moreover, for mobile phones that do not support the DRM function, the copyright control of JAVA applications is also realized.

Description of drawings

Fig. 1 is the flowchart of the method of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The gist of the present invention is to provide a solution for realizing DRM protection in Java applications by adding a DRM attribute list in a JAD file. As shown in Fig. 1, the present invention provides a method for implementing DRM protection in Java applications, which includes the following steps.

A1. Presetting the Java application descriptor file, which contains DRM information; wherein, the DRM information includes at least one of the following items: prohibition of forwarding, limitation of usage times, limitation of usage date, limitation of usage interval, and limitation of usage duration.

Generally, the DRM information can be set as a DRM attribute list, which is beneficial to improve storage and search efficiency.

A2. When the Java application is started, the Java application descriptor file is first parsed, the DRM information is obtained, and the DRM protection for the Java application is executed. Generally, step A2 is performed in a device conforming to the device configuration with limited connectivity. For example, step A2 is executed in the mobile phone.

First, you need to parse the DRM attribute list in the JAD (Java Application Descriptor, Java Application Descriptor) file. The JAD file contains information such as the size, name, type, installation path, and copyright of the program.

That is to say, when starting a Java application, before executing the Java application, AMS (Application Management System, application program management software), also known as JAM (Java Application Manager, Java application program manager), first needs to parse the corresponding JAD file, And the DRM attribute list of the Java application is obtained successfully.

For example, the DRM attribute list mainly includes the following items: FL (prohibition of forwarding), Count (limitation of use times), Datetime (limitation of use date), Interval time (limitation of use interval), TIME summation (limitation of use time), Delete (delete attribute), wherein, the delete attribute is generally used in conjunction with other attributes, such as the limit on the number of uses, etc. After other DRM attributes reach the limit, it is judged whether to automatically delete the JAVA application according to this attribute.

Then, perform DRM protection on Java according to the analyzed DRM attribute value; for example, after the mobile phone completes the analysis of the DRM attribute of the JAD file, it completes restrictions on the use of JAVA applications as required. Use date restrictions, use interval restrictions and use duration restrictions, etc.

An example is that after obtaining the DRM information, the following step may also be performed: judging whether the DRM information includes at least one of the following items: prohibition of forwarding, limit on number of times of use, limit on date of use, limit on use interval, limit on use duration , that is, to determine whether the Java application is protected by digital rights management; if yes, perform DRM protection on the Java application according to various DRM information.

When the application on the mobile phone cannot be run again due to DRM protection, if the user tries to use the application, a prompt may be given to the user whether to delete it according to the deletion attribute. If the user selects yes, delete the app. In this way, the function of automatically prompting the user to delete the protected Java application protected by the digital rights management can be realized.

As an example, the following steps may also be performed after step A2:

A301. When a certain Java application is started repeatedly, judge whether to continue executing the Java application according to the DRM information, otherwise execute A302; that is, after parsing the Java application descriptor file, obtain the DRM information, and then according to the The DRM information is used to determine whether to continue executing the Java application. If the DRM information is satisfied and the condition for repeatedly executing the Java application is met, then continue to execute the Java application.

A302. Prompting the user whether to delete the JAVA application; in practical applications, the JAVA application may also be directly deleted from the user terminal according to different permissions, different priorities, or preset conditions.

A303. Determine whether the user's feedback information agrees to delete, and if yes, delete the JAVA application. A timer can be set here, and within the preset time, if there is no feedback from the user, it can be processed according to the preset method, such as directly deleting or giving up the deletion operation.

Another example is that the DRM information also includes automatic deletion information; and, after obtaining the DRM information in step A2, the following steps are also performed: A21, judging whether the DRM information is automatic deletion information, if yes, perform A22; A22 , Automatically delete the JAVA application. Wherein, the following steps are executed before step A22: Prompting the user whether to delete the JAVA application, and judging whether the user's feedback information agrees to delete, if yes, execute step A22.

In another example, the following step is executed after step A2: A3. According to the result of the DRM protection, it is judged whether to continue to execute the Java application.

A complete example is given below to describe the method of the present invention in detail.

Step 1: Parse the DRM attribute list in the JAD file.

Before the Java application starts, AMS first needs to parse the corresponding JAD file and successfully obtain the DRM attribute list of the Java application.

In the JAD file of the Java application, it is necessary to add the definition of the special key value. For example, the JAD file is as follows:

MIDlet-Description: This MIDlet is released by www.imusic.com.cn

MIDlet-Info-URL: http://www.imusic.com.cn/wapdiyJavalist.php

MIDlet-1: ExtremeAir Music, icon.png, GameMIDlet

MIDlet-Name: Music

MIDlet-Vendor: VMusic

MIDlet-Version: 1.0.1

MIDlet-Jar-Size: 66679

MIDlet-Jar-URL: Music.jar

/*The following is the list of DRM attributes*/

DRM-FL: YES

DRM-Count: 5

DRM-datetime: none

DRM-interval time: none

DRM-TIME summation: none

Step 2: Perform DRM protection on Java according to the parsed DRM attribute value.

After the mobile phone completes the analysis of the DRM attribute of the JAD file, it completes the restriction on the use of the Java application according to the requirements.

DRM-FL is YES, indicating that the Java application is forbidden to forward.

DRM-Count: n means that the Java application can be run n times (n is an integer), and after n times, the mobile phone prohibits the user from running the application and prompts the user to delete the application.

DRM-datetime: X month x day x hour x year, before this date the Java application can run, after this date the mobile phone prohibits the user from running the application and prompts the user to delete the application.

DRM-interval time: x hours x minutes, after running the application, the Java application is allowed to run again only after the interval exceeds this time.

DRM-TIME summation: x hours and x minutes, the time that the user has used the app is this time, when the accumulative use time of the user reaches this time, the user can no longer use the app, and the user is prompted to delete the app.

Step 3: Prompt the user to delete the Java application automatically; when the application on the mobile phone cannot run again due to DRM protection, when the user tries to use the application, a prompt should be given to the user whether to delete it. If the user selects yes, delete the app.

By adopting the method of the invention, the problem of realizing DRM protection in various Java applications is solved by adding DRM attributes in JAD files; moreover, for mobile phones that do not support the DRM function, the copyright control of JAVA applications is also realized.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present invention.

Claims (8)

1. A method for realizing digital rights management protection in a Java application, comprising the following steps: A1. Preset the Java application descriptor file, which contains digital rights management information, and the digital rights management information includes at least one of the following items: prohibition of forwarding, limit on the number of times of use, limit on the date of use, limit on the use interval, and limit on the duration of use ; A2. When the Java application is started, it first parses the Java application descriptor file, obtains the digital rights management information, and performs digital rights management protection for the Java application. 2. The method according to claim 1, characterized in that, in step A1, the DRM information is set as a DRM attribute list. 3. The method according to claim 1, characterized in that, after obtaining the digital rights management information in step A2, the following steps are also performed: Judging whether the digital rights management information includes at least one of the following items: prohibition of forwarding, use times limit, use date limit, use interval limit, and use time limit, if so, execute the Java Digital rights management protection applied. 4. The method according to claim 3, characterized in that, after step A2, the following steps are also performed: A301. When the Java application is repeatedly started, judge whether to continue executing the Java application according to the digital rights management information, otherwise execute A302; A302. Prompting the user whether to delete the JAVA application; A303. Determine whether the user's feedback information agrees to delete, and if yes, delete the JAVA application. 5. The method according to claim 1, wherein the digital rights management information further includes automatic deletion information; In addition, after obtaining the digital rights management information in step A2, the following steps are also performed: A21. Judging whether the digital rights management information is automatic deletion information, if yes, execute A22; A22. Automatically delete the JAVA application. 6 . The method according to claim 5 , wherein the following step is performed before step A22: prompting the user whether to delete the JAVA application, and judging whether the user's feedback agrees to delete, and if yes, perform step A22. 7. The method according to claim 1, characterized in that the following steps are executed after step A2: A3, according to the result of the digital rights management protection, judging whether to continue to execute the Java application. 8. The method according to any one of claims 1 to 7, characterized in that step A2 is executed in the mobile phone.

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