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External Reference Monitor

  • US 20130111211A1
  • Filed: 10/31/2012
  • Published: 05/02/2013
  • Est. Priority Date: 10/31/2011
  • Status: Active Grant
First Claim
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1. A method for increasing security of an untrusted device, the method comprising:

  • sending a request to the untrusted device, the request indicating one or more challenges to be performed by a secure application executing on the untrusted device;

    determining an expected response to the one or more challenges, wherein the expected response is determined at a secure hardware component based on an expected configuration of the untrusted device;

    receiving a response to the request from the untrusted device;

    determining a security status of the untrusted device based on the expected response and the received response; and

    allowing the untrusted device to perform one or more functions based on determining that the security status of the untrusted device is a secure status.

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