ALEXANDRIA, Va., March 31 -- United States Patent no. 12,591,880, issued on March 31, was assigned to Visa U.S.A. Inc. (San Francisco).
"Terminal data encryption" was invented by Ayman Hammad (Pleasanton, Calif.) and Patrick Faith (Pleasanton, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method is disclosed. The method includes generating an initial key after interacting with an access device, storing the initial key at a key storage location, altering the initial key with a public key to form an altered key, and sending the altered key to a server computer along with an identifier for the access device. The altered key is changed to the initial key at the server computer and is stored with the id...