Page 85 - DCAP309_INFORMATION_SECURITY_AND_PRIVACY

Unit 6: Biometric Controls for Security

6.5 Key Success Factors Notes

For any effectual biometrics system, there are a some significant factors related with it: accuracy,
speed and throughput rate, acceptance by users, exclusiveness of biometrics organ and action,
reliability, data storage needs, enrolment time, intrusiveness of data collection, etc.
Effective performance of biometrics system would rely on these factors as discussed below.

6.5.1 Accuracy

It is the most important trait of a biometric identification verification system. If the system
cannot correctly separate an authentic person from an imposter, it should not be considered a
biometrics identification system. There are two concerns that occurs-false rejection rate (FRR)
and false acceptance rate (FAR):
1. FRR: This rate is usually articulated as a percentage. It is the rate at which authentic,
enrolled persons are discarded as anonymous persons by a biometrics system. It is also
called Type 1 error. When FRR increase, it may be fine if it is a tight security area such as
defense or medical foundation but not fine if it is a retail business. FAR is a reverse
condition. This is the rate at which unenrolled persons are established as authentic, enrolled
persons by a biometrics system. FAR is also called Type II error.
2. Crossover Error Rate (CER): It is the rate at which FAR and FRR compares. It is also called
EER and is specified as a percentage. This is the most significant measure of biometrics
system accuracy. ERR or CER displays the accuracy level at which the probability of a false
non-match.

Did u know? Full form of ERR
Equal Error Rate.

6.5.2 Speed and Throughput Rate

For biometrics system classification, speed and throughput are imperative. Data-processing
ability of the biometrics system decides the speed; it is declared as how fast the accept or reject
decision is articulated. It associates to the authentication procedure; the system setup, card input
or PIN; inputting the physical data by inserting the hand or finger, aligning the eye speaking
access words or signing a name processing and matching of data files, etc. A system speed of 5s
of start up via decision enunciation is good as per usually accepted standards. Another standard
is a portal throughput rate of 6-10 per min, which is equal to 6-10 s per person through the door.

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Caution Regardless of great strides in the biometrics research, it is not simple for most
biometrics systems to meet these standards.

6.5.3 Acceptability by Users

User acceptability to-date is a big confront for enveloping deployment of biometrics systems,
this is mainly owing to the social sigma linked to the biometrics system provided their nature
and lack of adequate responsiveness on biometrics identification system. Biometric system
acceptance appears when those who must access the system, that is, management and unions

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