This book introduces a dynamic cloud storage system framework (DCSF) is an attribute and policy-based dedupe system that provides advanced security access control and the quickest attribute key generations. Also provided an efficient de-duplication of encryption for better cloud data engineering using Enhanced message digest 5(MD5). This DCSF framework increases the level of optimization of virtual data storage and its security. The DCSF framework creates a hybrid cloud storage system which is a combination of proposed deduplication, Distribute Multiple Authentication with Ciphertext-Policy for Attribute-Based Encryption technique (DMACPSABE) security schema, AES with blowfish method. This book increases the level of cloud data storage security and avoids duplications (Unnecessary mirroring) based on secure crypto primitives. The main motive of this security framework is not only restricted to providing security on data, it needs to extend its security to protect the data and to focus on the duplication of data by setting some rules for expected behavior for those data.