The invention provides a method, system, and program product for authenticating a user to a telephonic communication device. In one embodiment, the invention includes obtaining a reference sample of an authorized user's voice, storing the reference sample of the authorized user's voice, collecting a sample of the voice of a user of the telephonic communication device, comparing the sample of the voice of the user to the reference sample of the authorized user's voice, determining whether the user is the authorized user, and in the case that the user is determined not to be the authorized user, prohibiting use of the telephonic communication device.