Patent ID: 7948361

Claim:
A method of authenticating a user, comprising a computing device performing the steps of: acquiring a first measurement of a first specific internal, non-volitional electrical process occurring within the user using a sensor coupled to a handheld device; acquiring a second measurement of a second different, specific, internal biological structure of the user using the sensor, wherein the first measurement comprises different measurements than the second measurement; layering the first measurement of the first specific internal, non-volitional electrical process and the second measurement of the second specific, internal biological structure into a layered biometric marker, the layered biometric marker comprising the first measurement of the first specific internal, non-volitional electrical process and the second measurement of the second internal biological structure; comparing the first measurement of the first specific internal, non-volitional electrical process of the layered biometric marker to a biometric profile of the user and the second measurement of the second specific, internal biological structure of the layered biometric marker to the biometric profile of the user; and authenticating the user if the first measurement of the layered biometric marker corresponds to the biometric profile of the user and the second measurement of the layered biometric marker corresponds to the biometric profile of the user.