Abstract: Data stored in the network is growing rapidly. And then, its security has received more and more attention. Based on the trusted computing of active immunity, it combines virtualization technology with trusted computing technology. A virtual trusted platform based on Kernel-based Virtual Machine(KVM )is built. The network storage data leakage protection models of client and server are established respectively. The network storage data are encrypted by vTCM, and the keys are stored in di erent virtual domains for isolation and protection, which improves the key security and enhances the network storage data security.