ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,770,115, issued on Oct. 20, was assigned to Visa International Service Association (San Francisco).

"Transaction signing utilizing asymmetric cryptography" was invented by Adam Clark (Bristow, Va.) and Kim Wagner (Sunnyvale, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments relate to systems, apparatuses, and methods for performing transaction signing utilizing asymmetric cryptography and a private ledger. A transaction data is signed by a user device using a private key, and may be utilized in an authorization request message without including a real credential of the user. A transaction verification and accounting module (TVAM) can ver...