DYNAMICALLY ENFORCING ACCESS CONTROL FOR DIGITAL DOCUMENT ALREADY OPENED ON A CLIENT COMPUTER
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United States of America Patent
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Issued Date -
Aug 4, 2016
app pub date -
Jan 30, 2015
filing date -
Jan 30, 2015
priority date (Note) -
Abandoned
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Abstract
In a digital rights management (DRM) system having a server and a client, a method can dynamically enforce users' access rights to protected documents even after a document is already open in a viewer application on the client. The server has a DRM database storing various access rights of users with respect to documents, and grants access permissions upon request from the client to allow specific users to access specific documents. In addition to requesting access permissions at the time of opening a document, the client requests updated permissions from the server from time to time while the document is still open. If the updated permissions are different from those granted at the time the document was opened, the client dynamically disables/enables or modifies the functions of the viewer application based on the updated permissions while the document is still open.
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