Patent Document ID: 8724856
Application ID: 13953619
Patent Status: 1

Claim One:
1. A method of verifying, by a processing system, whether a user of a device corresponds to a previously authenticated user, the processing system having access to a first image and a second image, the first image being an image of an identity document comprising an image of the previously authenticated user and data identifying the previously authenticated user, the identity document having been validated in respect of the previously authenticated user by a trusted authority, whereby to previously authenticate the user, and the processing system being arranged to derive, from the identity document, said data identifying the previously authenticated user, wherein the second image is an image captured by the device, the method comprising: comparing said first image to said second image, whereby to determine whether they are images of the same user; and, when it is determined that the first and second images are images of the same user: designating one of the first and second images as a higher quality image; storing said designated image as a validated image of the previously authenticated user in a storage device together with an identifier for the previously authenticated user, said designated image being designated for use in a subsequent verification event for the previously authenticated user; and arranging for said derived data to be stored, together with said identifier for the previously authenticated user, whereby to enable said data to be retrieved in a subsequent verification event for the previously authenticated user.