
MorphoAccess® SIGMA Family Administrator Guide
MorphoAccess® Terminal Administration Menu
2017_2000025464-v03
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209
July 17
Number of Biometric Check Attempt
The administrator can configure the Biometric Matching Strategy by means of which multiple
biometric check attempts are allowed to the user. This is to reduce the False Rejection Rate
(FRR). For instance, a user is allowed to place again his finger on the biometric sensor for a 2nd
try, when the first one fails.
The 2nd try allows the user to upgrade the finger placement, or to place another finger.
Biometric Check Attempts allows an administrator to set:
Standard Matching Strategy (1 Attempt): If the administrator has configured this mode,
the user is allowed to place finger only one time. Access is rejected if the authentication
fails in the first attempt.
Advance Matching Strategy (2 Attempts): If the administrator has configured this mode,
the user is allowed to place finger up to two times. This means that, if authentication
fails on the first attempt, terminal will ask user to place again his finger on the biometric
sensor, and perform biometric check again.
Advanced Matching Strategy with MFU (2 Attempts): If the administrator has
configured this mode, the user is allowed up to two attempts. If authentications fails in
the first attempt, terminal will look for the user in the Most Frequent Users list. If the
user is not found in this list then user is given a second chance. On the second attempt
the terminal will search for a matching biometric in the entire database. This option is
solely for identification purposes and not for authentication.
Parameter Configuration
By default, the Advance Matching Strategy mode is enabled. Please refer to the table below for
further details.
Parameter name
Value
Description
auth_param.additional_bio_c
heck_nb_attempt
1, 2 or 3
Set this parameter to '1' to offer only one
attempt.
If parameter is '2', terminal allow to perform
biometric second time after a first incorrect
identification/authentication attempt.
Setting value to '3' results in workflow similar to
two attempt and also enables MFU (Most
Frequent User).