Patent attributes
Techniques for user authentication are disclosed. In one embodiment, the techniques may be realized as a method including during registration of a user, receiving a first captured image of a physical key having a blade; identifying from the captured image a plurality of features associated with the blade of the physical key; associating the identified plurality of features with the user as key feature data; in response to a subsequent access request by the user requiring authorization of the user, prompting the user to present the physical key; receiving a second captured image in response to prompting the user; analyzing the second image to determine if the key feature data is represented in the second image; and in response to determining that the key feature data is represented in the second image, authorizing the user's access request.
