An on-demand cloud storage scheme based on context aware

To protect the confidentiality, integrity and privacy of users' data in cloud storage, a hierarchical cloud storage scheme based on environment features is proposed. The scheme maps the relationship between user attributes, data encryption security requirements, operating environment and data security storage levels. The hierarchical cloud storage addressed twice is realized. Firstly, the starting address of storage area corresponding to user data is determined according to the data security requirement level. Secondly, the data address offset is calculated through the data attribute set and account information set, and finally the hierarchical cloud storage of data is realized. Experimental results show that users' security requirements are met and security is improved, providing a solution for the implementation of cloud storage.