Specifications

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9.12. Biometric Authentication

By default, the V-Smart reader shall require that users present a candidate

fingerprint for authentication. However, biometric authentication may be

globally disabled on the V-Smart reader. In this mode, the reader will act

simply as a card reader and output a Wiegand string after a valid card has

been presented.

10. Estimated Performance

Bioscrypt works to continuously improve the performance of the core fingerprint

authentication technology while also improving the usability and flexibility of the

system. We have developed a database of real-world fingerprint images and use

these images to test the algorithm used by the V-Smart. This database has

increased in size to the point where today we perform 1,000,000 comparisons to

generate the following statistics.

10.1. Performance Terminology

Biometric systems typically state performance in terms of False Rejection

Rates (FRR) and False Acceptance Rates (FAR).

The FRR is the expected rate at which the system would incorrectly reject

(fail) the correct fingerprint – this assumes that the ID number is provided

correctly from a valid proximity card.

The FAR is the expected rate at which the system would incorrectly accept

(pass) the wrong fingerprint.

10.2. Authentication Algorithm

The authentication algorithm allows for two different performance-tuning

parameters: Global Security Threshold and individual Template Security

Threshold.

Table 2: Security Threshold Error Rates lists the FRR and FAR values

for various security levels. The V-Smart will use the lower of either the Global

Security or individual Template Security Threshold when performing the

authentication.

Security Threshold FRR FAR

Very High (1) 1/100 1/20,000

High (2) 1/200 1/5000

Medium (3) 1/1000 1/1000