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Loading ...how fingerprints are stored in the sql database?11?
this is for writing a software using java application for maintaining the attendance of employee of a certain organisation using fingerprint scanner.what is internal processing taking place,and how to access the database using java?
Posted in Scanner | 
Tags: application, attendance, database, employee, Fingerprint, fingerprint scanner, fingerprints, Java, java application, organisation, Scanner, software, sql, sql database, using java
2 Responses to “how fingerprints are stored in the sql database?11?”
This depends on the scanner and on the configuration of the scanner.
Most scanners give a long string.
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You can always save it as a blob or byte field and type convert it in your application when you read it in. Most databases HASH (encrypt) the fingerprint for security purposes.
So for instance, in MySQL, you could HASH a new fingerprint and save it into a BLOB column. When you need to check the fingerprint in the future, you simply collect the fingerprint, hash the value, and compare it to the HASHED fingerprint in the database. If they match then you have the same fingerprint.
HASHed values cannot be decrypted.
http://dev.mysql.com/doc/refman/4.1/en/data-type-defaults.html
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