The invention provides a content safety protection scheme with transparent flows for a cloud platform. Encryption, authorization and authentication functions of a cloud platform application in complex flows can be transparently achieved. The content safety protection scheme is application to a data safety protection mechanism in a cloud computing environment and provides safety supports trusted by users for massive data in a cloud computing system. A technical architecture of a data privacy protection platform in the cloud computing environment comprises a platform and a client plug-in. The system platform comprises an application agent service, a page translating service, an encryption/decryption service, an authority management service and an authority adaptation service. The client plug-in is installed on a user terminal. The content safety protection scheme is advantageous in that the safety does not depend on a cloud computer service provider, the safety service efficiency is high, elasticity is high, expandability is high and the like.