Patent ID: 11934510
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. A computer system for authenticating a user who requests access to an electronic resource, the computer system comprising:
one or more computer processors, one or more computer-readable storage media, and program instructions stored on the one or more of the computer-readable storage media for execution by at least one of the one or more processors, wherein the computer system is capable of performing a method comprising:
prompting the user to select a set of shapes and to produce five electronic drawing images for each shape of the selected set of shapes;
receiving the selected set of shapes and the five electronic drawing images from the user;
training a set of user specific positive discrimination vectors for each shape of the selected set of shapes based on the five electronic drawing images, wherein training further comprises comparing the five electronic drawing images to a set of computer generated sample images for each shape of the selected set of shapes;
in response to receiving an access request from the user to access the electronic resource, presenting a drawing challenge to the user, wherein the drawing challenge instructs the user to draw a particular reference shape, wherein the particular reference shape is one of the selected set of shapes;
in response to the drawing challenge, receiving an electronic representation of the particular reference shape from the user;
generating an image vector from the received electronic representation of the particular reference shape;
authenticating the user by comparing the generated image vector with the user specific positive discrimination vectors for the particular reference shape; and
in response to the authentication producing a positive result, granting the user access to the electronic resource.