Preformancebiometrics

=Performance of Biometrics=



Biometrics systems identify you based on your physical and behavorial traits, they are there to confirm your identity and confirm that you are who you claim to be. Forensics do generally the same thing but they use the information to determine facts in criminal investigations. Instead of using something you have, like a key, or something you know, like a password, they use **who you are**. Many people think that biometrics are much safer than passwords because it is harder to forge them. It is hard to forge them because they are who you are and these traits rarely change much over your lifetime, which is why they are ideal. There are three main parts to a biometric system: enrollment, storage and comarision.


 * Enrollment**: The first time you use the system it record certain basic information about you. It records your name, identification and an image or recording of the specific trait they have decided to use.


 * Storage**: Most biometric systems don't store the complete image or recording. They analyze your trait and translate it into a code or graph, and this is what the system stores in their database.


 * Comparision**: The next time you access the system it compares the trait that you present and the information that they have saved on file. And according to that the system will either accept or reject who you claim to be.



The best system depends most on the accuracy. Companies use things like FAR, FRR, FTE, FTAs to adjust their security.


 * False Accept Rate (FAR)** : How many imposters the system accepts.


 * False Reject Rate (FRR)** : How many authorized users the system rejects.


 * Failue to Enroll Rate (FTE)** : How many people's traits are of insufficient quality for the system to use.


 * Failue to Acquire Rate (FTA)** : How many times the user must present their trait before the system correctly responds and either accepts or rejects them.

More information?

@http://www.rand.org/pubs/documented_briefings/DB396/DB396.pdf