Generating an evaluation-mask for multi-factor authentication

A computer program product for multi-factor authentication, the computer program product comprising:

• one or more computer readable storage devices and program instructions stored on the one or more computer readable storage devices, the stored program instructions comprising:
• program instructions to generate an evaluation-mask over one or more modified items on a modified image, wherein the modified image is created by a generative adversarial network (GAN);
• program instructions to create a scoring grid by comparing an original image with the modified image to identify different pixels between the original image and the modified image;
• program instructions to overlay the evaluation-mask over the identified different pixels on the modified image;
• program instructions to display the modified image as a multi-factor authentication prompt to a user, wherein the user is prompted to provide a response that identifies one or more modifications in the modified image;
• program instructions to compute an evaluation score based on a comparison of the response from the user with the evaluation-mask, to validate the response from the user;
• and
• responsive to the evaluation score meeting or exceeding a predetermined threshold, program instructions to authenticate the user and granting the user access to data or other resources.

A computer system for multi-factor authentication, the computer system comprising:

• one or more computer processors;
• one or more computer readable storage devices;
• program instructions stored on the one or more computer readable storage devices for execution by at least one of the one or more computer processors, the stored program instructions comprising:
• program instructions to generate an evaluation-mask over one or more modified items on a modified image, wherein the modified image is created by a generative adversarial network (GAN);
• program instructions to create a scoring grid by comparing an original image with the modified image to identify different pixels between the original image and the modified image;
• program instructions to overlay the evaluation-mask over the identified different pixels on the modified image;
• program instructions to display the modified image as a multi-factor authentication prompt to a user, wherein the user is prompted to provide a response that identifies one or more modifications in the modified image;
• program instructions to compute an evaluation score based on a comparison of the response from the user with the evaluation-mask, to validate the response from the user;
• and
• responsive to the evaluation score meeting or exceeding a predetermined threshold, program instructions to authenticate the user and granting the user access to data or other resources.