Research On Attribute-Based Keyword Search Encryption Scheme In Cloud Storage

With the continuous popularization of internet technology and the rapid development of cloud computing,a large amount of data needs to be transmitted on the network.People are enjoying the convenience of the network while also suffering from the continuous leakage of sensitive information.In order to prevent the leakage of a large amount of sensitive information,it is necessary to encrypt the data information before it is shared,thereby ensuring the confidentiality and security of the data.Attribute-based encryption(ABE)can effectively solve the above problems.In ciphertext policy-based encryption,the data owner embeds the access control structure in the ciphertext.Only the attributes in the private key of the data user satisfy the access structure to decrypt the ciphertext and obtain the message.Massive data is stored in encrypted form on the cloud server,but this has brought great challenges to data retrieval,resulting in attribute-based searchable encryption.Searchable encryption has features such as controllable security and controllable search.Attribute-based searchable encryption refers to the combination of attribute-based access control and keyword search.While ensuring the confidentiality of data,the retrieval of ciphertext and keywords is realized,and access security of fine-grained information is achieved while ensuring information security.This article focuses on the search-based encryption mechanism based on attributes to doThis article focuses on the search-based encryption mechanism based on attributes to do relevant research,the main work is described as follows:1)A reversible and efficient multi-user searchable encryption scheme is constructed for the problem of low search efficiency in the existing partial attribute-based keyword search encryption schemes.The new scheme simplifies the search process by reconstructing the keyword index and data users with the assistance of a proxy server to rebuild the search trapdoors with the help of a proxy server by the data owner.For mobile cloud storage,where the user's computing power is not very strong or the environment is limited,an efficient index construction algorithm and trapdoor generation algorithm will greatly reduce the user's computational capabilities.The scheme uses the access tree structure as an access control strategy to implement fine-grained information access control.The new scheme greatly improves the search efficiency of documents while ensuring the safe sharing of document information,and can be applied to the mobile cloud storage environment.2)For the problem of limited computing capacity and environmental limitations of mobile users in cloud storage applications,the encryption and decryption operations of files are complex and the amount of computation is large.A new outsourced decryption keyword search encryption scheme is constructed.The new scheme adopts the access tree control structure,combines attribute-based access control with keyword search,and reduces the complexity of file decryption by regenerating the user private key and the data owner's ciphertext,and constructs the index of keywords and the search token implements searchable keywords.In the new scheme,a large amount of decryption work is completed by a cloud server with powerful computing capabilities,thereby reducing the workload of users and achieving outsourced decryption.Finally,the comparison between safety analysis and experiment shows that this scheme has more advantages and higher efficiency than the original scheme.