International Association of Computer Science and Information Technology(IACSIT)
This paper aimed at the popular cloud computing technology, analyzed the security problems it faced. A model for protecting the data's integrity and confidentiality in the cloud server was raised, which took the reference of BLP (Bell-LaPadula) model, and the CW (Clark-Wilson) model, and component, security axiom and realization of the model are given. Cloud computing is an emerging computing model, which is based on grid computing, it is a distributed computing. At present, the three major security problems of that cloud computing security are identity and access control, Web security protection and virtualization security and so on. Many manufacturers have concerns about permissions and management authority of cloud model.