Research And Improvement Of Symmetric Searchable Encryption Scheme

With the vigorous development of the Internet industry,users' demand for data resources is also increasing.In order to meet the needs of users,cloud computing came into being.In the era of interconnection,cloud storage is already one of the hottest applications in cloud computing,and users are increasingly inclined to store important and private information in cloud servers.One of the most commonly used methods is to encrypt the data information before uploading it to the cloud server.However,searching for the required data information in the cloud server has also become an obstacle.In order to eliminate this obstacle,search encryption technology comes along,it can help users achieve their search goals.Therefore,this paper researches and improves based on symmetric searchable encryption scheme.The specific research achievements include:Aiming at the problem that the cloud server is not trusted as a third party,this article designs a verifiable method based on an effective symmetric searchable encryption scheme,in order to verify the correctness of the search results returned by the cloud server,which is verifiable symmetry Searchable encryption scheme(referred to as VSSE scheme).This scheme achieves the verifiability by using the message authentication code(MAC)technology.In addition,this article extends the VSSE scheme to meet the special needs of users in the search process.Finally,through security analysis and performance evaluation tests,the scheme is shown to be safe and effective.Aiming at the problems caused by objective factors such as incorrect spelling or inconsistent format during the search process,this paper constructs a searchable encryption scheme that supports fuzzy search,verifiable and ranked based on a searchable encryption scheme(called as VRFSE scheme).VRFSE scheme utilizes the edit distance technology to implement the fuzzy search function.At the same time,the cloud server can return to the user the top-k files that are most relevant to the user's search keywords,so as to achieve the real purpose of the user search.In addition,this article analyzes the correctness,safety,and efficiency of this scheme,the scheme is shown to be safe and effective.