International Association of Advances in Engineering and Technology (IAAET)
Cloud computing provides elastic, scalable on-demand IT services for individuals and organizations. In the cloud computing, everything is as the service. Cloud clients enjoy convenience and efficiency service, but at the same time encounter new issues. Cloud clients needs to provide authentication information to access to service, which often contains a lot of sensitive information. The service provided by cloud is dynamic, diverse, and context-related. The traditional identity authentication methods which implement coarse-grained to allow or prohibit access is no longer to adapt service-oriented cloud computing.