Patent ID: 8407463
Filing Date: 2013-03-26
Classification: G06F,H04L,H04W

Abstract:
1. A method of authentication of users in a data processing system, the method comprising: generating a challenge univocally associated with a user to be authenticated; processing the challenge to generate an expected answer code to be compared to an answer code that the user provides for authentication; encoding the generated challenge to obtain an image displayable on a display device; sending the image containing the challenge to the user; displaying the image containing the challenge on the display device; capturing, by a user device having an image-capturing device, an image of the displayed image containing the challenge; processing, by the user device, the captured image for extracting the challenge from the captured image, and subsequently processing the extracted challenge for generating the answer code; receiving the answer code from the user and comparing the answer code to the expected answer code; and in case of positive comparison, authenticating the user, wherein one among said actions of generating the challenge and the expected answer code and said action of processing the captured image to generate said answer code exploit secret information univocally associated with the user.