The Research Of Verifiable On Searchable Encryption For Cloud Storage

With the rapid development of Internet technology and integration with life,the generation of massive data has brought a huge impact on data management,and how to manage the massive private data stored in the cloud is very important.However,the urgent problem is how to effectively ensure the security of user data on the cloud server.Searchable encryption has always been one of the hot topics in the field of cloud storage technology.Starting from the search requirements of actual application scenarios,this paper analyzes and studies the existing schemes,and designs a more efficient and practical searchable encryption scheme.The specific research content and results are as follows:1.Efficient verifiable conjunctive keyword search based on cuckoo filter for cloud storage.In a real complex network scenario,since it is impossible to ensure the complete credibility of the third-party server,it is very likely that a malicious server may return wrong search results or steal user information for personal gain or to save computing overhead.This will bring significant security risk to users.In this paper,we propose a verifiable conjunctive keyword search scheme based on cuckoo filter(VCKSCF),which significantly reduces the verification and storage overhead of the system.At the same time,since single-keyword query restricts the application of searchable encryption,we need a more expressive searchable encryption solution in actual application scenarios.Our solution implements multi-keyword query.Security analysis shows that our scheme has reached the security of IND-CKA and the search proof and search token in the scheme are unforgeable.Experimental evaluation shows that our scheme achieves perferable performance in the actual environment.2.Fuzzy searchable encryption based on the verifiable conjunctive keyword search.The traditional searchable encryption is limited to the precise query of keywords.However,in actual operation,it is difficult to avoid the spelling errors of keywords in the query requirements submitted by users.Fortunately,fuzzy search for querying came into being and it can intelligently check the keywords entered by users.On the basis of the previous scheme,we propose a verifiable conjunctive keyword searchable encryption scheme that supports fuzzy search.In the scheme,we utilize the local sensitive hash function and the cuckoo filter to realize the fuzzy search,which have certain fault tolerance for the keywords input by the user.Through theoretical analysis and performance comparison with existing schemes,it is worthwhile to believe that our scheme solves the problem of fuzzy search in one-to-many mode with verifiable conjunctive keywords searchable effectively.