What is it? Biometrics are a way of verifying a person's identity, similar to how the Chip and PIN works. It recognises a person based on physical or behavioural characteristics. These include fingerprints, facial features, iris, voice recognition and handwriting. This is different from personal information, but still has data unique to that person. An example of a biometric scanner is a fingerprint scanner. It first needs to take an image of the fingerprint, however the image is never saved. It only takes biological data to form a string of binary code. When a fingerprint is pressed against the scanner then it scanners the biological data to see if it matches with the binary code. That way nobody can duplicate the image of the fingerprint. Where is it used? Biometric scanners are used as a high form of security in the military and at airports in the security systems, for example visas and biometric passports are used in most recently. Biometric scanners are also typically used to gain access to high level security buildings. The reason biometrics are becoming increasingly common is because it is so hard for frauds to fake as the data is the unique to that certain individual. What does it do? The biometric scanners analyse the features of the person to make sure it is really them. What the advantages of biometric scanners? As I have mentioned before information for biometric scanners are much harder to fake. Another advantage is that whereas if the person has an ID card and then they misplace it, then they have no proof to support the fact they are who they claim they are. But a fingerprint or iris is always on a person, so it cannot be lost. It is harder to gain access if a biometric scanner is used as a security as it cannot be guessed like a passport and it would be extremely difficult to create a duplicate. Also the person cannot forget their fingerprints in the way they forgot a password.