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Flesh-and-Blood Biometrics: Page 3 of 5

The palm-reading information is stored in a database, so theft of this data, along with other information, could let attackers create a "spoof" device--for instance, a USB device that acts like PalmSecure but feeds the recorded image to the USB port instead of performing the scan. Although this is possible, the amount of work required might make it impractical for the average identity thief--that is, until the first such device is built and the instructions for building it are published on the Internet.

Another concern is biological: In cold weather, a body contracts blood vessels in the extremities to maintain a higher level of blood flow in its core, to keep the body alive, possibly at the expense of a few fingers, toes, or even hands and feet. This decrease in blood flow changes the look of the veins in the hand. The net result is that in cold weather it can take as long as several minutes for the palm reader to recognize a user; still, this timeframe is better than it would be with, say, finger venous pattern matching, since following exposure to cold, blood flow normalizes in the palm before it does in the fingers.

The Gore Factor

Hollywood has scared us with vivid images of people being killed, their fingers cut off for their fingerprints or their eyes plucked for retina scans. Resulting concerns--whether justified or not--about that kind of scenario have impeded adoption of the technology. IT managers don't want system security that decreases a user's personal security, and while, in the light of day, it's farfetched to think that a user will be maimed or killed if he uses a biometrics system, the concern has been a hard one to completely ignore.