ALEXANDRIA, Va., June 4 -- United States Patent no. 12,321,428, issued on June 3, was assigned to NIPPON TELEGRAPH AND TELEPHONE Corp. (Tokyo).

"User authentication device, user authentication method, and user authentication computer program" was invented by Shmuel Ur (Shorashim, Israel), David Ash (Kirkland, Wash.) and Vlad Dabija (Mountain View, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A user authentication device includes: a collection part collecting information of a user; a generation part generating a question for the user on the basis of the information of the user collected by the collection part and a skill model of the user; a presentation part presenting the question for the user gene...