Researchers at Clarkson University have found that fingerprint readers
can be spoofed by fingerprint images lifted with Play-Doh or gelatine
or a model of a finger moulded out of dental plaster. The group even
assembled a collection of fingers cut from the hands of cadavers.
In live fingers, perspiration starts around the pore and spreads along the ridges, creating a distinct signature of the process.
In a systematic test of more than 60 of the carefully crafted samples,
the researchers found that 90 percent of the fakes could be passed off
as the real thing.
But when researchers enhanced the reader with an algorithm that looked
for evidence of perspiration, the false-verification rate dropped to 10