Biometric verification is a very popular type of access control used by most of the organisations to provide physical security. It identifies individuals by analysing their physical and behavioral characteristics. Biometric verification can be done by biometric devices, which scan and capture the biometric data inputs. The biometric device consists of a reader or a scanning device and a database where all the biometric data is stored. When the biometric device gets biometric input like fingerprint, pattern of iris or retina, etc., it scans the input and converts the scanned information into the digital data with the help of software that are preinstalled in the biometric device and compares the digital data with the data stored in the database. Further, if the data matches, the biometric device allow the individual to get the access otherwise it restricts the individual from getting the access.