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home :: system overview :: how biometric measuring devices work
SYSTEM OVERVIEW
HOW BIOMETRIC MEASURING DEVICES WORK
The most secure form of access control to ensure that the individual requesting access is the person to whom access permission is granted is biometrics.
A biometric measuring device records a unique characteristic of an individual and grants access based on this identity.
However, these devices are (for the most part) expensive when compared to the credential based technologies and keypads.
WHAT TO CONSIDER WHEN CHOOSING A TECHNOLOGY
Consider all aspects of the decision when choosing a technology for granting authorized access. This means that costs should be a part of the decision.
But when the identity of the individual receiving access to the controlled area is of prime importance, or if the area being protected is mission critical and a high degree of confidence is needed that the person to whom access is granted is the same person for whom access permission was intended, biometrics is the most appropriate choice.
INDIRECT COSTS WHEN CHOOSING BIOMETRIC ACCESS CONTROL
There are also indirect costs to consider when selecting biometrics as the access control device such as the difficulty in conducting the enrollment process and maintaining the network necessary to manage the enrollment database.
Each biometric technology has additional considerations as presented below.
EYE SCAN - RETINA
Eye scan devices are highly sophisticated biometric measuring devices that require that the user’s eye information to be entered in the system through an “enrollment process”.
This process differs from manufacturer to manufacturer but essentially the eye scan reader is optioned to record the retina pattern of an individual in the authorized population and stores that pattern for later comparison. The eye scan unit is then set to read those patterns when an appropriate identification (usually a key pad entry) is given to the eye scan device. The eye scan reader then compares the enrolled scan with the current scan and, if they match, access is granted.
EYE SCAN - IRIS
The iris eye scan reader works in a similar fashion to the retina scan reader but reads a different part of the user’s eye. In an iris reader the iris pattern is recorded and used for later comparison.
HAND SCAN
Hand-scan readers measure hand characteristics of individuals in the authorized population.
It is presumed that these characteristics such as length between knuckles and other hand size features are unique in each individual. Like eye scan devices, hand scanners require an enrollment process and compare the enrolled data to subsequent readings when an individual authorized population requests access to the controlled area.
FINGER MATRIX
A finger matrix fingerprint reader uses fingerprint images to distinguish individuals.
An enrollment process is required that records a fingerprint pattern of an authorized individual and during a request for access, the pattern presented by the requester is compared to the pattern on file.
If they match, access is granted.
VOICE RECOGNITION
Voice recognition systems require that an individual in the authorized population speak a series of words for the enrollment process into an enrolment reader.
When requesting access at a controlled door, the user is given a set of word(s) to repeat and if a voice pattern match exists, access is granted.
Voice recognition has waned in popularity in recent years but such systems are still in use today.
Choosing the right biometric measuring security product for security in commercial buildings requires the assistance of a qualified professional. An expert design can help you chose the right technology for your application.
Choosing the right biometric measuring security product for security in commercial buildings requires the assistance of a qualified professional. An expert design can help you chose the right technology for your application.
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