ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,425,381, issued on Sept. 23, was assigned to Google LLC (Mountain View, Calif.).
"Hybrid content protection architecture for email" was invented by Nicolas Lidzborski (Belmont, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A computer-implemented method when executed by data processing hardware of a user device causes the data processing hardware to perform operations. The operations include obtaining, from a message server, an encrypted message encrypted by a single-use data encryption key (DEK) and an encrypted DEK including the single-use DEK encrypted by a public key (PK). The operations also include transmitting, to a key access control lis...