ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,468,915, issued on Nov. 11, was assigned to Impinj Inc. (Seattle).
"Item identification via RFID tag secret" was invented by Matthew Robshaw (Seattle), Tan Mau Wu (Seattle) and Christopher J. Diorio (Shoreline, Wash.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method is provided to determine unique identifiers. A physical item has an RFID integrated circuit (IC) having a unique identifier and a secret. The RFID IC may be configured to provide an identifier portion and a response to a previously sent challenge, where the identifier portion by itself is insufficient to completely identify the IC or item and the response is based on the challenge and ...