ALEXANDRIA, Va., June 4 -- United States Patent no. 12,321,443, issued on June 3, was assigned to Apple Inc. (Cupertino, Calif.).
"Authentication and control of encryption keys" was invented by Timothy R. Paaske (Cupertino, Calif.), Weihua Mao (Monte Sereno, Calif.) and Shu-Yi Yu (Sunnyvale, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus, a method, and a system are presented in which the apparatus includes an interface control circuit that may be configured to receive a message including a cryptographic keyword and a policy value. The policy value may include one or more data bits indicative of one or more policies that define allowable usage of the cryptographic keyword. The apparatus al...