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The biometric verification systems that are currently being used include:
fingerprint, iris, voice, retina, hand, vein and signature.
Out of all of these, the Iris can return the most accurate results. But since it requires the system or device to come very close to the individual’s eyes, it is not a desirable method of verification. In addition, such devices or systems tend to be very expensive and bulky, putting limits on their practical application.
A typical voice recognition system is usually more affordable, but it is not always reliable because the human voice is subject to changes due to illness, hoarseness, or other common throat problems. This system is also subject to extraneous noises in the surrounding area, static and varying conditions.
The hand recognition system tends to take too much space and has a high return rate of False Acceptance (FAR). Therefore, this system is rarely used in high security zones. There are also cost problems in its administration, as well as concerns over access to confidential information.
Vein recognition can guarantee top security because it is almost impossible to duplicate an individual’s vein. But it also has limits in practical application because its hardware structure is extremely complex, and the entire system comes at a very high cost.
The results with a signature recognition system, like the voice recognition system, are easily affected by various factors, and therefore it is not reliable.
Fingerprint recognition has long been the favoured among many biometric identification technologies due to its uniqueness and permanence. Nowadays, fingerprint recognition is considered to be the best choice for most applications from network security systems to compact devices, due to its accuracy, speed, reliability, non-intrusive interfaces, and cost-effectiveness, resulting in acquiring 50% of the shares in biometric markets.
