Shortcomings
- Many commercial iris scanners can be easily fooled by a high quality image of an iris or face in place of the real thing.
- The scanners are often tough to adjust and can become bothersome for multiple people of different heights to use in succession.
- The accuracy of scanners can be affected by changes in lighting
- Iris scanners are significantly more expensive than some other forms of biometrics, password or prox card security systems
- Iris scanning is a relatively new technology and is incompatible with the very substantial investment that the law enforcement and immigration authorities of some countries have already made into fingerprint recognition.
- Iris recognition is very difficult to perform at a distance larger than a few meters and if the person to be identified is not cooperating by holding the head still and looking into the camera. However, several academic institutions and biometric vendors are developing products that claim to be able to identify subjects at distances of up to 10 meters ("standoff iris" or "iris at a distance" as well as "iris on the move" for persons walking at speeds up to 1 meter/sec).
- As with other photographic biometric technologies, iris recognition is susceptible to poor image quality, with associated failure to enroll rates.
- As with other identification infrastructure (national residents databases, ID cards, etc.), civil rights activists have voiced concerns that iris-recognition technology might help governments to track individuals beyond their will.
- Researchers have tricked iris scanners using images generated from digital codes of stored iris's. Criminals could exploit this flaw to steal the identities of others.
Read more about this topic: Iris Recognition
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