Authentication is the process of confirming the authenticity of a client to identify its validity. If the user is valid then server permits the accessibility of its assets. Many authentication techniques and protocols are available to protect the server’s assets from getting unauthorized access. This paper presents an overview of different factors, protocols and methods associated with authentication and their importance in real life scenarios. Extensible Authentication Protocol (EAP) is a framework which aims to provide a flexible authentication for wireless networks. The aim of this survey paper is to study the widely used authentication methods and their evaluation for advantages and disadvantages.

authentication, authentication protocols, factors, EAP ,TLS, TTLS, MD5, LEAP, PEAP

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