Biometrics. Topics. Biometric identifier classification Biometric identifier characteristics comparison Multimodal Biometrics Biometric Standards Challenges in Biometrics. Identifiable biometric characteristics. Biological traces DNA, blood, saliva, etc.
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Courtesy of G. Bromba
Human eye has its own totally unique pattern of blood vessels.
Because of its internal location, the retina is protected from variations caused by exposure to the external environment (unlike fingerprints).
Selecting the ‘right’ biometric is a complicated problem that involves more factors than just accuracy. It depends on cost, error rates, computational speed, acquitability, privacy and easy of use.
The ideal biometric characteristics have five qualities:
Quantitative measures of these five qualities have been developed.
A biometric system can be designed to test one of only two possible
Applications to test the first hypothesis are called "positive
identification" systems while applications testing the latter are
called "negative identification" systems.
A generic biometric system.
Late integration or decision fusion
Every biometric characteristic has some limitations
You can place the “gummy finger” over your real finger. Observers aren’t likely to detect it when you use it on a fingerprint reader.
Don’t try this at home! (Matsumoto)