Blockchain Technology in Biometric Database System

The Biometric system can be understood as a system that deals with an automated recognition of individual based on their physiological aspects (face, fingerprints, iris, retina) and behavioral patterns (signature, posture etc.). Biometric system works on feature extraction and feature matching. The feature is extracted in the form of fingerprints, iris and retina and then it is matched by the information stored by measuring the same patterns of particular individual, this process is feature matching. Between the two, works template database which is a central point from where every time the feature extracted is matched for confirming the identity of a person.. If the database is breached by the hacker, then the data could be used for falsifying the identity of the person. The paper focuses to implement blockchain technology in a biometric system in a manner that every record of individual is maintained using a blockchain so that it can’t be hampered by the hacker. Blockchain works as adecentralized repository of data which we assume to be the most suitable approach to hold the credentials of individuals and thus avoiding an unauthorized access to the systems. Making changes to blockchain is a complex and time-consuming task for any unwanted user. Many researchers contributed their work highlighting the security issues of the biometric system when applied practically. They noted that the fingerprint of an individual remains the same over life and once applied can’t be modified when compares with non-biometric systems which makes use of passwords and if forgotten or breached could be changed. Some of them conveyed that the biometric system is safe when only considering its physical implementation but the database created is still under threat.