Abstract: CVDBN security deployment model of virtual machine was proposed in allusion to security risk caused by multiple consumers' sharing hardware resource in the environment of cloud computing and the security rules of subject server to deploy the object virtual machines were designed based on BN modcl,which can meet users' isolation require- ment on deployment of virtual machines with interest conflict. In the end, the security module of deploying virtual ma- chines and the security algorithm of deploying virtual machines were designed. Simulation was conducted which demon- strates the effectiveness and availability of the model and algorithm proposed in this context.

Key words: Cloud computing, Security, Virtual machine, I3N model, Conflict of interest, Security taboo list of servers