Patent ID: 8762733

Claim:
A method for verifying a person's identity, comprising: measuring a biometric of a person whose identity is known, wherein the biometric comprises a respiratory biometric, and setting a baseline for the biometric based on the measurement, wherein the thoracic or abdominal girth of the person is measured; calculating an acceptable variation range for the biometric, wherein the acceptable variation range has upper and lower bounds that differ by a percentage of the measured biometric, and is based on the baseline and the normal deviation for the biometric across a population sample of people; storing the acceptable variation range in a memory; obtaining a password or key from a person to be verified; comparing the obtained password or key to a plurality of known passwords or keys to determine a likely identity of the person to be verified, wherein each of the plurality of known passwords or keys are associated with a specific person; obtaining a measurement of the biometric from the person to be verified and setting a value for the biometric for the person to be verified; and comparing the value of the biometric for the person to be verified to a stored acceptable variation range of a specific person associated with the obtained password or key to verify the likely identity of the person to be verified.