Research On Secure And Efficient Storage And Retrieval Technology On Multiple Public Clouds

In the modern society,with the development of Internet and information technology,more and more data has been produced in people's daily life,which leads to the explosion of information.For both individual and social organization,the amount of information is getting bigger and bigger,and the costs of storage and fast retrieval are becoming higher and higher.As the rapid development of cloud computing and big data,an economical solution has been found for the storage of massive data.As the growing of cloud computing and big data technology,the storage of centralized data is becoming more and more unsuitable for practical requirements,the diversification of terminal equipment and intelligent would make it possible to have distributed storage and computing.Considering many aspects,such as economy,efficiency and safety,small and medium-sized data storage organizations are gradually outsourcing the growing business data to professional storage service providers and selecting multiple services in order to improve the availability of data.Some institutions are also studying the use of public cloud storage business data.The data outsourcing service reduces the cloud service users' work of managing and maintaining the database,and achieves the goal of optimizing local resource allocation and reducing the costs of storage resource investment.However,as users have lost full control over the data stored in the cloud,and dereliction of duty of the personnel(of cloud server),enemy attacks as well as security risks,the safety,usability and privacy of outsourced database has become the main obstacle for cloud tenants to accept cloud data service.In this sense,secret sharing technology is safely distributed on numerous servers while it sent part of computing tasks(such as part of the search algorithm)for distribution to the server to perform as a natural choice.Based on secret sharing technology,this paper studies efficient distributed data storage and retrieval of key technologies,and explore the way to protect the confidentiality,integrity and availability of data which is used on the external storage device so as to realize some basic operations,such as,data adding,deleting,updating,and indexing.Then,we can provide the corresponding storage structure of efficient retrieval method based on single and multiple keywords,and implement the data of some complex query operations.At last,we can design prototype system based on the above technologies.Usually,due to the randomness of the data share,data are stored in different positions in the form of secret sharing and it is difficult to search in normal mode after retrieval.The idea of secret sharing presented in this paper is the core of distributed storage method which is the key to this topic science problem.Users can search in unknown and even malicious cloud storage and retrieval of documents on the server without leaking the file content,as well as the content of the query.Through the research of this paper,we have got a set of technologies,which is relatively complete and safe,based on secret sharing of the distributed data storage and retrieval technology framework.We also got a set of proprietary relating to the implementation algorithm in storage and retrieval.Then,it formed the technology patents relating to the security of distributed data storage and retrieval in order to design a distributed data management prototype system.