Abstract:To address the problem of privacy data preservation of multi-tenancy applications, on the basis of analyzing characteristics of multi-tenancy applications and the corresponding demands of privacy data preservation. The trusted computing technique was introduced into privacy data preservation of multi-tenancy, presented an encryption and preservation approach with customizability based on virtual trusted platform module(vTPM). Privacy data of multi-tenant was encrypted by making use of encryption key provided by vTPM, and the encryption key was protected by using encryption key preservation and management of vTPM. Finally, the approach was implemented based on the Xen implementation vTPM.