Granted Patent B2

US 12,554,811 · App. 17/310,972 · Granted Feb 17, 2026

Inventors: Gabriele Gelardi (London, GB); Gery Ducatel (London, GB)

Assignee: British Telecommunications Public Limited Company

G06F21/316G06F21/10G06N20/00H04W12/065

Abstract

Claims (13)

1 . A computer implemented method of access control for a user device having at least one component for determining behaviors of a user, the method comprising:

accessing a machine learning classifier trained based on at least one prior behavior of the user using the device, the classifier classifying user behavior as compliant or non-compliant such that compliant behavior is determined by the classifier to be consistent with prior behavior of an authorized user of the device;

initializing a measure of a period since a most recent compliant behavior occurred;

using the classifier, classifying a subsequent behavior as non-compliant;

responsive to a determination that the subsequent behavior is classified as non-compliant, determining if the period meets a threshold;

if the period does not meet the threshold, permitting access to the device;

if the period meets the threshold, requesting a credential-based authentication of the user and permitting access to the device in response to the credential-based authentication being successful;

wherein permitting access to the device further includes constructively training the classifier based on the subsequent behavior as a compliant behavior by providing the subsequent behavior as a training example.

2 . The method as claimed in claim 1 , wherein preventing access to the device further includes constructively training the classifier based on the subsequent behavior as a non-compliant behavior by providing the subsequent behavior as an additional training example.

3 . The method of claim 1 , wherein the component is one or more of: a location sensor; a position sensor; an orientation sensor; an accelerometer; an input device; a touch-screen; a temperature sensor; a time determiner; a pressure sensor; an olfactory sensor; a chemical sensor; a biometric sensor; a heart rate sensor; a cardiogram generator; a sound sensor; a voice recognition component; a handwriting recognition component; a global positioning system; and a gyroscope.

4 . The method of claim 1 , wherein the credential-based authentication includes one or more of: an authentication scheme using a user identifier and password; a key-based user authentication scheme; a token-based user authentication scheme; and a multi-factor authentication scheme in which authentication is requested via a different device.

5 . A computer system comprising a processor and memory storing computer program code for performing the method of claim 1 .

6 . A non-transitory computer-readable storage medium storing computer program code to, when loaded into a computer system and executed thereon, cause the computer to perform the method of claim 1 .

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (164)