R Wesley Porpatham, G. Jaspher W. Kathrine
The key elements for the hike in the global knowledge-sharing are the Networks and the Internet. The immense influence of the Internet is lessened for the reason that the Security of the communications over the internet is put at risk in various ways. To employ all the advantages of Networks, a Secure Network Architecture is in need. Among the various security domains, Network Security is of a major concern. The dynamic fluctuations in the behavior of Networks, yields a wide range of attacks that open doors for the bogus users to exploit the resources, illegitimately. Authentication is the possible first-line of defense in any Networks for one entity to confirm its communicator to be legal. This Survey explains the various Authentication Schemes that are being practiced. The methodologies of the authentication schemes are discussed, their success and failures are studied and the various attacks that breaks them are traced.