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Fingerprint Passwords, How Trustable?
(Click here to view the original thread with full colors/images)
Posted by: TotalRecall
Thinking that a fingerprint is unique and can be used for high security access? This may not be the case:
Matsumoto uses gelatin, the stuff that Gummi Bears are made out of. First he takes a live finger and makes a plastic mold. (He uses a free-molding plastic used to make plastic molds, and is sold at hobby shops.) Then he pours liquid gelatin into the mold and lets it harden. (The gelatin comes in solid sheets, and is used to make jellied meats, soups, and candies, and is sold in grocery stores.) This gelatin fake finger fools fingerprint detectors about 80% of the time.
His more interesting experiment involves latent fingerprints. He takes a fingerprint left on a piece of glass, enhances it with a cyanoacrylate adhesive, and then photographs it with a digital camera. Using PhotoShop, he improves the contrast and prints the fingerprint onto a transparency sheet. Then, he takes a photo-sensitive printed-circuit board (PCB) and uses the fingerprint transparency to etch the fingerprint into the copper, making it three-dimensional. (You can find photo-sensitive PCBs, along with instructions for use, in most electronics hobby shops.) Finally, he makes a gelatin finger using the print on the PCB. This also fools fingerprint detectors about 80% of the time.
The companies that create these fingerprint sensors have been denying this for some time, but I would say their views are somewhat slated. Read more here.
Source: Slashdot
Posted by: redwench
of course those work. as would cutting off the finger and using it. retinal scanners are more accurate. last i heard, you cant duplicate the pattern and use contacts. and only "live" eyes can be scanned, so you cant remove an eye or kill someone to get access.
but maybe someone will come up with a material that can fool a retinal scanner. we shall see ^^
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