A potential problem related to the physical installation of the Iris Scanner in regards to the usage of the iris pattern within a biometric system is:
Click on the arrows to vote for the correct answerA. B. C. D.
Because the optical unit utilizes a camera and infrared light to create the images, sun light can impact the aperture so it must not be positioned in direct light of any type.
Because the subject does not need to have direct contact with the optical reader, direct light can impact the reader.
An Iris recognition is a form of biometrics that is based on the uniqueness of a subject's iris.
A camera like device records the patterns of the iris creating what is known as Iriscode.
It is the unique patterns of the iris that allow it to be one of the most accurate forms of biometric identification of an individual.
Unlike other types of biometics, the iris rarely changes over time.
Fingerprints can change over time due to scaring and manual labor, voice patterns can change due to a variety of causes, hand geometry can also change as well.
But barring surgery or an accident it is not usual for an iris to change.
The subject has a high-resoulution image taken of their iris and this is then converted to Iriscode.
The current standard for the Iriscode was developed by John Daugman.
When the subject attempts to be authenticated an infrared light is used to capture the iris image and this image is then compared to the Iriscode.
If there is a match the subject's identity is confirmed.
The subject does not need to have direct contact with the optical reader so it is a less invasive means of authentication then retinal scanning would be.
Reference(s) used for this question: AIO, 3rd edition, Access Control, p 134
AIO, 4th edition, Access Control, p 182
Wikipedia - http://en.wikipedia.org/wiki/Iris_recognition The following answers are incorrect: concern that the laser beam may cause eye damage.
The optical readers do not use laser so, concern that the laser beam may cause eye damage is not an issue.
the iris pattern changes as a person grows older.The question asked about the physical installation of the scanner, so this was not the best answer.If the question would have been about long term problems then it could have been the best choice.Recent research has shown that Irises actually do change over time: http://www.nature.com/news/ageing-eyes-hinder-biometric-scans-1.10722 there is a relatively high rate of false accepts.
Since the advent of the Iriscode there is a very low rate of false accepts, in fact the algorithm used has never had a false match.
This all depends on the quality of the equipment used but because of the uniqueness of the iris even when comparing identical twins, iris patterns are unique.
The physical installation of the Iris Scanner is critical to the proper functioning of a biometric system that uses iris recognition technology. The iris scanner uses infrared light to capture an image of the iris, which is then used to identify an individual. While iris recognition is a highly accurate and reliable biometric technology, there are some potential problems that can arise from the physical installation of the iris scanner.
Option A: Concern that the laser beam may cause eye damage This is a valid concern when using an iris scanner that emits a laser beam. However, most iris scanners use an infrared light source, which is not harmful to the eyes.
Option B: The iris pattern changes as a person grows older. This is a true statement. As a person ages, the iris pattern can change due to factors such as disease, injury, or even cosmetic eye surgery. This can result in false negatives or false positives in the biometric system.
Option C: There is a relatively high rate of false accepts. This is not a problem related to the physical installation of the iris scanner. False accepts, also known as false positives, occur when the biometric system incorrectly matches an individual's iris pattern to that of another person.
Option D: The optical unit must be positioned so that the sun does not shine into the aperture. This is a valid concern as direct sunlight can interfere with the iris scanner's ability to capture an accurate image of the iris. To prevent this, the iris scanner should be installed in a location that is shielded from direct sunlight or in a housing that blocks out external light sources.
In conclusion, the potential problem related to the physical installation of the iris scanner in regards to the usage of the iris pattern within a biometric system is the change in the iris pattern as a person grows older and the potential for direct sunlight to interfere with the scanner's accuracy.