面向用户安全的云存储方案研究

In order to keep users' data safe, this paper started with architecture, proposing a storage solution based on software-defined cloud storage. This solution is based on software-defined cloud storage architecture, aimed at storing data in different cloud storage service providers that have a competitive relation with each other, to ensure data confidentiality; a file retrieval probability model based on chunked replica redundancy was set up. Storage solution was modeled in accordance with file retrieval probability and expense, and then the model was solved by genetic algorithm.In the end, this paper compares the cloud storage model proposed in this paper with the single cloud storage strategy, proving that the storage strategy in this paper can effectively improve the recoverable probability of data, and the architecture proposed in this paper can effectively guarantee the user's data security.