A Policy-based De-duplication Mechanism for Securing Cloud Storage
Zhenyu Wang, Yang Lu, Guozi Sun · 2015
With the rapid development of information technology, the amount of data of information systems increases at an unprecedented pace. Extension and development of clouding storage systems are becoming the rst choice for businesses and individuals to store their data. However, the data is stored in the cloud and users lose the control over their data completely, so encryption is required before upload the data. But, general encryption methods have conflicts with data de-duplication. Some researchers use convergent encryption as a solution, but there are also some semantic security issues. Another threat comes from semi-trusted cloud storage providers (CSP), which can disclose users' privacy information. In this paper, we propose a policy-based de-duplication architecture, using the mechanism of security proxy (SP) and random storage, which separate storage services and security services to ensure the security of user data and improve the system effciency at the same time.