ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,470,409, issued on Nov. 11, was assigned to International Business Machines Corp. (Armonk, N.Y.).

"Generate blockchain-based user secrets to authenticate users to decentralized services" was invented by Shunguo Yan (Austin, Texas), Steven D. Clay (Taylor, Texas) and Michal Broz (Cedar Park, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "User authentication is provided. A most recent user secret block of a set of unprocessed user secret blocks corresponding to a user is retrieved from a blockchain. The user is challenged using a question and answer pair contained in the most recent user secret block of the set of unprocessed user secret blocks corr...