Adverts from Google:
Bio-metrics is the group of techniques which use some form of body measurement as a 'key' to some secure system or other. They appear to offer the answer to those seeking to ensure security of digital signatures. Let me be clear; they are not. The technical explanation is that they cannot be revoked. What does this mean?
In the world of digital signatures, the technical aspects for ensuring a cryptogram cannot be attacked by brute force arithmentic attack, are fairly well established. Arrangements for the management of keys are not. They are, surprisingly, singularly unconvincing. The chances are growing that the management of keys will prove too difficult, and will defeat attempts to introduce workable systems.
A 'bio-metric' is the idea that, for example, in order to gain access to your business account, you place your eye near to the camera on the cash point wall, and your retina is examined, and checked against records held by the bank. If they match you get access to the account. Instead of your eye, it might be your thumb-print, or even the smells in your arm-pit! You can, for the sake of argument, be thus uniquely identified.
This seems to be perfect, but a moment's thought suggests this has huge risks.
Once the bio-metric is captured, it is communicated to and held in digital form somewhere on a computer. Ask then two questions.
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