JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY
John Daugman. Portrait of Dr John Daugman (born 1954), British inventor of the IriScan computer recognition system. IriScan identifies people by features in the iris of their eye, & was developed by Daugman at Cambridge University, Britain. Each person's iris is as individual as their finger- print, but with 266 identifiable features is much more detailed. Its appearance does not change dur- ing a person's life. The iris moves continuously, making it impossible to forge one with a replica glass eye. An iris is scanned as the person stands about 20 centimetres in front of a video camera for a few seconds. A computer compares the iris' features to stored data in under 3 seconds.
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