The Study Of Immunization Strategy Under The Cloud Environment

Cloud network is a new comput and service model. The new IT delivery willaffect the changes of IT industry profoundly. Therefore, the security of the cloudnetwork is the hot research topic in recent years. The thesis is replied on the“Research on the Ecological Defense Architecture in the Network Security”(No.F2009000927), supported by the Hebei Natural Science Foundation. Referencedthe artificial immune technology and complex network theory, this paper will focuson the security problem of the cloud especially the virus propagation andimmunization strategy of the cloud.(1) The computer network model based on ecology, Monomer-Multimer networkmodel, was proposed by the depth analysis and research on the characteristics of thecloud network.A computer network model based on ecology, Monomer-Multimer network model,was proposed, which can not only simulate the computer network, but also describethe dynamic development of computer network from the view of eco-development.Bsaed on the complex network and the theory of model completeness, thecompleteness of this model is proven. The feasibility of the model is also proven bythe Repast simulation.(2)The propagation model applied to the cloud netowrk was proposed bycombined with the Monomer-Multimer network model and the virus propagationcharacteristics of the cloud network.Based on the above network model, combined with the characteristics of virus inthe cloud network, focused on the dynamics of the cloud, considerd theimplementation of immunization strategies and the time difference between thepropagation of virus and the implementation of the immunization strategies, the paperproposed a virus transmission model of cloud network: USIR virus propagationmodel. The model react the realistic virus propagation process of cloud network. Thebalance point of the model was found through the mathematical analysis. The stability of the balance point was proved through the rigorous mathematical proof.(3)The immunization strategy applied to the cloud network, hierarchyimmunization strategy, was proposed.Based on the Monomer-Multimer network model, the paper proposed the securitymechanisms of cloud network. And the cloud immunization strategy was proposedbased on the virus propagation model of cloud netwok. It can protect the security ofcloud network by combined the security mechanisms and the immunization strategyof cloud network. In addition, the paper verified the effection of the immunizationstrategy by the experiment. Comperd to the traditional immunization, the proposedstrategy satisfy the cloud network.At last, the dissertation is summed up, and the direction for further research ispointed out.