Survey and analysis of Modern Authentication system

Modern Authentication system ensures that only the entrusted entities should communicate and ensures that unauthorized user which is trying to establish some connection in order to gain login to the system by impersonating his identity should be restricted to the confidential data. Now a days, modern authentication system receives more and more attention as the data exchanged over the network is important and confidential. So it is more likely to be vulnerable to the known security threats. However the design of the secure authentication protocol is quite challenging, considering the known security threats. In this paper, various authenticated protocol are being analysed according to their pros and cons, security threats and vulnerabilities and how they will withstand the known security attack. We have analysed the mention protocols PAP, SPAP, CHAP,MS-CHAP, EAP,KERBEROS.