Sequencing multi-keyword search encryption method with cloud supporting privacy protection

Abstract

The invention discloses a sequencing multi-keyword search encryption method with cloud supporting privacy protection. The main implementation steps of the method comprises: 1, constructing a sequencing searchable encryption system; 2, initializing the system, and obtaining public parameters of the system and a system master key; 3, generating a user private key; 4, by a data owner, encrypting a plaintext message by using a symmetric encryption algorithm to generate ciphertext data; 5, generating a ciphertext index; 6, generating a query trap door and a query vector; 7, performing search; 8, performing verification; 9, performing outsourcing decryption; and 10, performing local decryption. According to the method disclosed by the invention, the decryption efficiency, the cloud storage overhead and the ciphertext retrieval accuracy are greatly improved on the basis of protecting the privacy of the user, and the problems of privacy disclosure, high user calculation cost and the like in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of cloud storage security and ciphertext data security sharing, and in particular relates to a sorting multi-keyword search encryption method supporting privacy protection in the cloud. Background technique [0002] With the rapid development of new technologies such as the Internet of Things, 5G, and artificial intelligence, more and more smart terminals are used by people, and the amount of data generated is increasing, which promotes the arrival of the era of big data. Big data has a huge role in promoting the entire country and various industries in society, but it also brings serious problems: [0003] First, the user’s personal privacy is leaked, and personal privacy leaks will cause serious security risks, so the safe processing of data is very important; [0004] Second, in recent years, due to the advantages of high resource utilization and cost savings, cloud storage has been widely valued. More ...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to propose a sorting multi-keyword search encryption method that supports privacy protection in the cloud, which solves the problem of waste of resources caused by redundant files contained in the files returned by the cloud server in the traditional solution, and the high degree of confidentiality of the access strategy, thereby avoiding leaks Hidden problems

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