An Enhanced User Authentication Framework in Cloud Computing

Recently, there are several studies have proposed user authentication frameworks to defend against different types of attacks such as phishing, replay attack, man in the middle attack and denial of service attack, etc. Most of these frameworks consist of three main phases, which are the registration phase, login phase, and authentication phase. Most of them have the changing password process as an additional activity.Many problemshave been noticed in the performance of these frameworks. For example, the registration phase is valunerable to internal attack such as SYN flood attack. In this work, we aim to propose a robust user authentication framework that overcomes the previous framework shortages. The proposed framework provides many security aspects such as remote authentication, mutual authentication, session key establishment,to mention a few. Besides, to ensure the security through all phases of this framework, we add a new phase called a Service Access Authentication Phase (SAAP).This phase is resposable of the internal verification .