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This seems to be the most popular in terms of cost, performance and user
acceptability. There are two types of fingerprint reader - optical and
electrostatic. There are differences in cost, performance, long-term
reliability, ability to reject dead fingers and prosthetic substitutes etc.
and naturally different costs apply to different offerings.
Most
biometric readers require the person to first “declare” who they are, so
that their template can be retrieved from memory. This is because searching
for a match from all the stored templates would be time-consuming.
This
“declaration” is often simply done by PIN entry at a built-in keypad. But
extra security can be derived by using a card - because that establishes
that the right person has the right card, and therefore when that card is
subsequently used in non-biometric readers on the same site, it is more
likely that the card will still be with the correct owner. For this to work
properly, the biometric reader must "pass through" the card number UNCHANGED
when the biometric has been matched. |
