ALEXANDRIA, Va., July 14 -- United States Patent no. 12,683,813, issued on July 14, was assigned to Taiwan Semiconductor Manufacturing Co. Ltd. (Hsinchu, Taiwan).

"Physically unclonable function (PUF) generation" was invented by Shih-Lien Linus Lu (Hsinchu, Taiwan), Jui-Che Tsai (Tainan City, Taiwan) and Cheng-En Lee (Hsinchu City, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A PUF generator includes a difference generator circuit with first and second transistors having a first predetermined VT. The difference generator circuit is configured to provide a first output signal for generating a PUF signature based on respective turn on times of the first and second transistors. An amplifier includes a ...