Biometrics can be defined as the use of anatomical, physiological or behaviour characteristics to recognise or verify the claimed identity of a person. It requires the collection, processing and storage of details of person’s physical characteristics. Biometric technologies are used to confirm that the person is present rather than their token (e.g. bankcard) or identifier (e.g. PIN). A name, password, card, PIN, or key does not confirm the presence of the legitimate person. They rely on the assumption that the card is always with the owner and owners do not reveal their PIN/password to others, however loss and sharing of cards are big security weaknesses in a system.