ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,775,688, issued on Oct. 27, was assigned to Microsoft Technology Licensing LLC (Redmond, Wash.).
"User identity validation" was invented by Arulanandan Ponnivalavan (Karnataka, India) and Vishal Goyal (Delhi, India).
According to the abstract* released by the U.S. Patent & Trademark Office: "A data item is obtained that is representative of an activity associated with a legitimate user. A fact is derived from the data item and a question about the activity associated with the legitimate user activity is generated from the fact. An expected answer to the question is also generated based on the fact, and compared with an end-user response to the question in an end-user authentication p...