Offline DRM certificate management and control method in embedded equipment
An embedded device and certificate technology, applied in the field of DRM, can solve the problems of the user's use that cannot be followed up, inconvenient, and unable to continue to use the data content, and achieves the effect of eliminating backup and restoration, simple use, and good security.
Inactive Publication Date: 2011-04-20
WUDI SCI & TECH (XIAN) CO LTD
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Problems solved by technology
The user's use process is inconvenient due to the additional connection of auxiliary equipment
Moreover, if the hardware of the auxiliary device is damaged, the usage of the user cannot be tracked, and the user will not be able to continue to use the authorized data content before obtaining a new auxiliary device.
Method used
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[0042] see figure 1 , the present invention proposes a method for offline DRM certificate management and control in an embedded device, the method comprising the following steps:
[0043] 1) Obtaining data content and certificates; the data content here refers to the data that needs to be encrypted and protected by the DigitalContent that needs to be protected. Obtaining means that the user pays and downloads the data content and certificates from an interactive website. Embedded end users or programs will submit device-related hardware feature information (such as serial numbers, etc.) and user IDs, and then the issued certificates will record the feature information of these devices, and the certificate issuance center can number the certificates according to different devices , or all certificates can be numbered uniformly.
[0044] 2) Start enabling data content;
[0045] Enabling data content means that the user is going to use the data content obtained in step 1), such...
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The invention discloses an offline digital rights management (DRM) certificate management and control method in embedded equipment, which comprises the following steps of: 1) acquiring data contents and a certificate; 2) enabling the data contents; 3) judging whether the offline certificate related with the offline contents is found; 4) acquiring description of the equipment or description of a user in the offline certificate; 5) judging whether the offline certificate is distributed to the equipment or the user to use; 6) acquiring the unique number of the offline certificate; 7) judging whether the offline certificate is already registered in a 'certificate core abstract table' in the equipment; 8) acquiring core abstract information recorded in information items of the certificate coreabstract table; 9) judging whether the DRM offline certificate is out of date; 10) judging whether the offline certificate has use time limit; and 11) using the data contents. The offline DRM certificate management and control method in the embedded equipment does not need additional auxiliary devices, and can prevent the user from being backed up in the validity period of the certificate by registration, tracking and management of the 'DRM certificate' used in the embedded equipment.
Description
technical field [0001] The invention relates to DRM of embedded devices, in particular to a method for managing and controlling offline DRM certificates in embedded devices. Background technique [0002] DRM (Digital Rights Management) of embedded devices, the protection process is the way of "data content + authorization certificate". The data content is encrypted by some encryption algorithms, and the authorization certificate records the authorization information that the user legally pays and obtains for limited use, such as legal user information, legal use environment equipment information (equipment serial number, etc.), and usable time Limit (such as before a certain date), the number of times that can be used, etc. to protect the data content. [0003] Online (online) certificate verification method. In the use of data content, the verification process requires an online authorization center (DRM management server). When the user is required to make authorization j...
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Inventor 陈淮琰钟辉
Owner WUDI SCI & TECH (XIAN) CO LTD