Focusing on the development of new methods in biometric authentication that provide greater efficiency in the "IrisCryptoAgentSystem" (ICAS) model, this book delineates a biometric method for authentication using the iris of the eye and an asymmetric cryptography method using "Rivest-Shamir-Adleman' (RSA) in an agent based architecture. It introduces pretopological aspects in the development of the indexed hierarchy to classify DRVA templates and improves existing methods for the localization of the external and internal edges of the iris and for removing the intrusive effects of the eyelids.