ALEXANDRIA, Va., March 19 -- United States Patent no. 12,256,040, issued on March 18, was assigned to Pindrop Security Inc. (Atlanta).
"Authentication using DTMF tones" was invented by Payas Gupta (Atlanta).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of obtaining and automatically providing secure authentication information includes registering a client device over a data line, storing information and a changeable value for authentication in subsequent telephone-only transactions. In the subsequent transactions, a telephone call placed from the client device to an interactive voice response server is intercepted and modified to include dialing of a delay and at least a passcode, the passcode being...