Patent ID: 8345851

Claim:
A non-transitory computer-readable storage medium encoded with a computer program for securely transmitting a sequence of digits across a network from a voice communication device to a destination system, when executed, the computer program operable to: during a communication session, invoke an interactive voice response (IVR) routine for sequentially determining the digits in the sequence, for each digit the IVR routine making at least one digit guess or a query, a response by a user of the voice communication device to the at least one digit guess or the query indicating either a correct digit, an incorrect digit, or information to a digit guess or inquiry that narrows a range of possible remaining choices, the response being in a form that does not explicitly reveal a correct one of the digits in the sequence via spoken words or keypad entry to an eavesdropper who is able to discern the response, but not the at least one digit guess or the query of the IVR routine, the information being used by the IVR system as a basis for making at least one successive digit guess or another query until the correct digit has been determined; and once determined, send the sequence of digits to the destination system.