ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,506,621, issued on Dec. 23.
"Securing cryptographic keys" was invented by Silvio Micali (Brookline, Mass.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A security device includes a covering device that, in response to an input signal, consistently provides a same random output signal that varies according to the microstructure of the covering device, where altering the microstructure of the covering device alters the random output signal, a key generation component that generates a secret key based on the random output signal, and a digital signature component that produces a digital signature of a message received by the security device using the secr...