Abstract: Crypto biometric system is widely used in many information security applications to generate cryptographic key using the human retina characteristics. Biometric features will improve the security of cryptographic system. In this paper three retina biometric features are used to generate the key. They include the end points, bifurcation points and islands. This work emphasizes upon unification of three features which enables to generate the secured cryptographic key. This work introduces a unique method to generate a more secured cryptographic key. This mode of operations in network security creates more complexity for hackers to crack. Thus, security is further enhanced using the above technique.

Keywords: Cryptography, Biometrics, Endpoints, Bifurcation, island, Morphological operation, Encryption and Decryption