A Hierarchic Secure Cloud Storage Scheme based on Fog Computing

Since the cloud computing technology was proposed, it has developed rapidly. Cloud computing demonstrated that it was a major driver of change in the IT industry and there are a lot of cloud-based technologies deriving from cloud computing. With the Cloud computing development and global growth of data, cloud storage technology gets more attention and better development and attracts a large number of users. Users depend on the powerful storage capacity of cloud storage. However, in this storage schema, users' data is all stored in cloud servers. In other word, users lose their right of control on data and face privacy leakage risk. Traditional privacy protection schemes are usually based on encryption technology, but these kinds of methods cannot effectively resist attack from the inside of cloud server. Once the password gets compromised, users' data will be exposed to public. In order to solve this problem, we propose a hierarchic storage method based on fog computing model and design a Hash-Solomon code algorithm. We put a small part of data in local machine and fog server, which can take full advantage of cloud storage and protect the privacy of data. Through the theoretical safety analysis and experimental evaluation, the feasibility of our scheme is validated, which is really a powerful supplement to existing cloud storage scheme.