The invention may be embodied as an identity authentication system or method. A system according to the invention may have a biometric sensor capable of providing static biometric indications, an adhesive capable of positioning the sensor on an organism, and a computer in communication with the sensor. The computer may have software running on the computer in order to (a) cause the computer to determine whether there is a match between a subsequent static biometric indication and an initial static biometric indication, and (b) cause the computer to send a signal indicating whether a match was determined in order to authenticate the identity of the organism.