ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,549,942, issued on Feb. 10, was assigned to Cypress Semiconductor Corp. (San Jose, Calif.).

"Preserving privacy during secure transactions with ambient power devices" was invented by Hui Luo (Marlboro, N.J.) and Rakesh Taori (McKinney, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method includes broadcasting, by a powered wireless device, a survey request frame to a plurality of ambient (AMP) devices that harvest environmental energy, wherein the survey request frame comprises a unique public key to be used by each AMP device, of the plurality of AMP devices, to generate a survey response frame. The method includes using, within the survey req...