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Protected execution environments within a computer system

  • US 20050188422A1
  • Filed: 04/15/2005
  • Published: 08/25/2005
  • Est. Priority Date: 04/07/2000
  • Status: Active Grant
First Claim
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1. A method of providing a protected execution environment on a computer, the method comprising:

  • intercepting an input/output request for a file from an application;

    determining if the application is authorized to modify the protected execution environment;

    creating a null entry in a mirror directory structure for an executable for each application authorized to modify the protected execution environment, wherein determining if the application is authorized to modify the protected execution environment comprises querying the existence of the executable for the application in the mirror directory structure;

    creating a redirected input/output request to an alternate environment when the application is not authorized to modify the protected execution environment and the file is within the protected execution environment; and

    submitting the redirected input/output request to a file system manager.

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