Known fixed biometric identifiers may be used as variables over time and space, including but not limited to: Fingerprints, sweat gland pores, voice, facial features, iris, eye shape, ear shape, hand geometry, vein patterns, heartbeat, blood flow, gestures, writing sample, DNA, skin color, body vibration, brain wave, electromagnetic field or aura, balance, body scent, or any other known biometric. Biometric information may be stored in a database, detected by a sensor, coded into other formats such as barcodes, colors, frequencies on the electromagnetic spectrum, light waves, sound waves or any other medium capable of encoding analog or digital biometric data. This combination of the fixed and variable biometric information may be used to accomplish necessary and useful tasks.