The document proposes a safety design for cloud storage. It discusses cloud computing and cloud storage models. It then outlines security issues with cloud computing services including availability, reliability, and user data security. The proposed cloud storage architecture consists of a storage layer, management basis, application interface layer, and access layer. The cloud storage security design model includes storage cloud, control center, user interface, and client. Key technologies involve storage encryption, backup encryption, exchange encryption, and interface security. Applications include deterrent control, preventative control, corrective control, and detective control.