Up: Identifying Users
A relatively new method of identification for computer systems
is the biometric check.
It consists of comparing some readily accessible and reliably unique
physical characteristic of a human user against the system's
stored values for that characteristic.
Some commonly used biometrics are:
The advantages of biometrics are that they cannot be lent
like a physical key or forgotten like a password.
The drawbacks of biometric checks are obvious:
- hand proportions
- facial image
- retinal image
- finger prints
- voice print
- all the biometric sensors are relatively expensive, in both
monetary and computing terms;
- measuring hands requires that the appropriate hand be free,
ungloved, and that the user has a measurable hand;
- a facial image scan requires that the user's appearance not change
- a retinal image scan requires that the user has a measurable retina,
that eyeglasses or a contact lens not interfere, and that the user
is willing to allow the scanner's laser to scan their eye;
- fingerprint analysis has the same drawbacks
as the hand proportion metrics;
- voice print analysis is affected by noise and throat problems,
and requires that the user have a measurable voice.
Fri Oct 7 16:17:21 EDT 1994