Patent ID: 8384516

Claim:
A computer implemented method, comprising: recording, by a portable communication device, a user's voice as a user's first signature; receiving, by the portable communication device, a personal identification number (PIN) of a user; identifying, by the portable communication device, a master copy of the user's voice associated with the PIN; verifying, by the portable communication device, the user's first signature against the master copy; determining, by the portable communication device, a computer-generated radio frequency identification (RFID) code associated with the master copy in response to verifying the user's first signature; creating, by the portable communication device, a user's second signature comprising the RFID code and the user's first signature, wherein the RFID code and the user's first signature are each separately used to authenticate the user in a sequence comprising the user's first signature followed by the RFID code, or the RFID code followed by the user's first signature; and wirelessly transmitting, by the portable communication device, the user's second signature in an authentication transaction.