User guide

S900 User Guide
When the user places his/her finger(s) on the S900 fingerprint sensor
during the enrollment process, the S900 takes a picture of that user’s
finger’s key minutiae points. Then the S900 uses its proprietary
mathematical algorithm and converts that picture into a unique
mathematical template which is comparable to a 60-digit password.
This unique template is then encrypted and stored in the S900 database.
IMPORTANT NOTE
Privacy issues should never be a concern when using the S900 because
NO REAL IMAGE OF A USER’S FINGERPRINT IS STORED. ONLY the
minutiae-based templates
are stored.
Each time a user’s fingerprint is scanned, the S900 searches its database
for a matching fingerprint. If the S900 finds the user’s fingerprint, then
his/her “attendance/door access” is recorded in the S900 “audit log” and
will be noted in subsequent reports.
Getting Good Fingerprint Images
The quality of fingerprint images is relative to the number of minutiae
points captured by the S900’s sensor. Fingerprint images not possessing
an adequate number of minutiae points may be unreadable. It is advised
to issue a secret password for those users whose fingerprint images lack
sufficient minutia points and cannot be read by the sensor. Also, you
may consider purchasing an S900 with an integrated card reader if you
do not intend to assign passwords.
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