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METHOD FOR OFFLINE DRM AUTHENTICATION AND A SYSTEM THEREOF

  • US 20090183001A1
  • Filed: 11/12/2008
  • Published: 07/16/2009
  • Est. Priority Date: 01/16/2008
  • Status: Active Grant
First Claim
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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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