METHOD FOR OFFLINE DRM AUTHENTICATION AND A SYSTEM THEREOF
First Claim
1. A method for offline DRM authentication, wherein the method comprises:
- encrypting a data file with a DRM encryption standard and storing internal information into an authentication device;
verifying a legitimacy of the internal information in the authentication device by a software program on a local computer to which the authentication device is connected; and
if legitimate, opening and reading the data file encrypted with the DRM encryption standard.
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Accused Products
Abstract
A method for offline DRM authentication and a system thereof relates to the information security field. In order to solve the problem that a license must be requested from the server in the process of DRM authentication, the invention provides a method for offline DRM authentication, in which, the method comprises: a content provider encrypts the data file with DRM standard and stores the internal information in an authentication device, the authentication device is connected to the local computer, the software program on the local computer opens and reads the data file. A system for offline DRM authentication, in which, the system comprises an authentication device, a client PC and content provider side, the authentication device comprises the DRM service module and authentication communication module. Compared with the prior art, the present invention allows the user to use the DRM protected information without a network connection.
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Citations
20 Claims
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1. A method for offline DRM authentication, wherein the method comprises:
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encrypting a data file with a DRM encryption standard and storing internal information into an authentication device; verifying a legitimacy of the internal information in the authentication device by a software program on a local computer to which the authentication device is connected; and
if legitimate, opening and reading the data file encrypted with the DRM encryption standard. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for offline DRM authentication, wherein the system comprises an authentication device, content provider side and a client PC with a preinstalled software program,
the content provider side is adapted to encrypt a data file with a DRM encryption standard and store internal information into the authentication device, the client PC with the preinstalled software program opens and reads the data file which is encrypted with the DRM encryption standard and provided by the content provider side after the preinstalled software program verifies that the internal information pre-stored in the authentication device by the content provider side is legitimate.
Specification