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Continuous authentication confidence module

  • US 9,871,779 B2
  • Filed: 08/28/2015
  • Issued: 01/16/2018
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. A system comprising:

  • processor circuitry to operate in a trusted execution environment (TEE);

    sensor circuitry comprising at least one sensor to capture sensor input and a system monitoring module to monitor operation of the system and to collect monitor data related to the monitoring;

    communication circuitry to communicate with a remote communication partner; and

    a continuous authentication confidence module (CACM) to execute in the TEE and to;

    determine a confidence score in response to an initial authentication of a specific user, the confidence score to indicate a current strength of authentication at a point in time during a session;

    select a type of presence data for use to update the confidence score based, at least in part, on a level of the confidence score, wherein the CACM is to select a first presence data to update the confidence score when the confidence score is less than a first threshold and select a second presence data to update the confidence score when the confidence score is greater than the first threshold, wherein the first presence data acquisition is to consume more power than the second presence data acquisition;

    update the confidence score based, at least in part, on at least one of an expectation of user presence and the selected type of presence data; and

    notify the remote communication partner that the authentication is no longer valid if the updated confidence score is within a tolerance of a session close threshold.

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