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To use biometrics as authentication mechanism, there is a 3 step process required: an enrolment step, verification request step, and verification result step. Enrolment is the process of acquiring, digitizing and securely storing a biometric template for an individual. After enrolment, a verification request may then be made (as there is now something to compare against). A verification request is an attempt by someone to be verified or authenticated as being the person they claim to be Once the verification request is made, the newly acquired "template" is compared against the stored reference key, and an authorization result is returned which is positive or negative.
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