An apparatus and a method for generating a unique user identification code for a user of a biometric security system is presented. No biometric information is stored either within the security system or on a device, and process enables a unique user identification code to be generated to allow multi-system identification of the same user. The method includes retrieving a public key from the system, obtaining a characteristic from the user and generating a biometric value from the characteristic, and creating the identification code by combining and encrypting the generated biometric value and the system supplied public key, and transmitting the identification code to the system for authentication.
