David-Link DL=A User Manual
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Contents
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2.1.3 Match Threshold LevelsMatch Threshold Levels establishes a balance between False Acceptance Rate (FAR) and FalseRejection Rate (FRR). FAR is the frequency of a non-authorized user is falsely recognized andgranted access to the system. FRR the frequency of an enrolled and authorized user, who should begranted access to the system, is denied on the basis that the system did not recognize. FAR andFRR affect each other. Lower FAR yields to higher FRR.You can set match threshold levels on a per-use basis. The higher the threshold is set, the higherthe security is ensured; however, it is recommended to leave this setting as default, thresholdvalue = 3, since the default threshold is commonly accepted as the balance of FAR and FRR rate.In case of fingerprint verification difficulty, one can enter ID number before fingerprint verification(1:1 match) or lower the matching threshold (1: N).Table 2-1 Match threshold description2.1.4 User ID numberBefore the fingerprint enrollment, a user is assigned with a User ID Number. This ID number ismatched with a user’s identity and the matching fingerprint template during verification process.An ID number is assigned sequentially based on availability; however, you may choose any IDnumber as desired.2.1.5 Authority/Privilege LevelDavid-Link DL-A Door Access Control System contains authority/privilege levels:• User: one whose identity must be verified in order to gain access into a facility or to havehis/her attendance recorded.• Enroll Manager: One who only has access to enroll a new user.• General Manager: One who has access to all menu functions, except advanced settings.• Super Manager: One who has access to all functions and is allowed to make any change inthe system setting.7 |
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