On Fri, 24 Jan 2003, Thomas Shaddack wrote: > Use the kind of fingerprint reader that can also sense the blood flow in > the finger, kinda like the heart rate sensors on some exercise machines. > Dead fingers then will be of no use.
Photoplethysmography and photoxytometry are easy to fake once you know what you're looking for. Thin-skin translucent silicone casts of fingerprints (you can of course gather the patterns using the usual dactyloscopy paraphernalia, whether reduced iron magnetic brush or iodine/osmium tetroxide exposure) worn over live fingers would probably work. Frankly, the fingerprint is a lousy secret: you leak it all over the place. You can't help it, unless you're wearing gloves all the time. Ditto DNA.
