Research On Data Integrity Security Audit Of Cloud Storage System

Cloud storage provides a common storage space for users or organizations to release the user's local space.The 5G era has quietly approached,and the massive amount of data is growing.As a cloud storage player playing an important role,it faces even more severe challenges.Frequent dynamic operations and data level improvement put forward higher requirements for cloud storage data integrity security audit.Improving cloud storage audit efficiency and improving confidentiality in the audit process are the focus of this paper.This paper first introduces the research status of cloud storage auditing at home and abroad.The existing auditing efficiency of cloud storage auditing scheme needs to be improved,and there are few researches on the encryption of auditing system.Then two solutions are proposed to improve the efficiency and confidentiality of cloud storage auditing.The main work of this paper is as follows:(1)The LBT multi-branch structure is improved.Each node stores file block information,adds local root nodes,shortens the index path,and can achieve the purpose of improving audit efficiency in both static audit and dynamic audit.The combination of theoretical analysis and experiment is used to prove the scheme.The results show that the cloud storage auditing scheme has higher auditing efficiency than the general LBT tree structure.(2)Based on the actual cloud storage environment,users have different confidentiality requirements for data.The general encryption method for sensitive information is easy to leak privacy,and a higher level of security is required.However,general data does not need higher security level,which causes waste of resources.Data hierarchical encryption method is divided into parallel hierarchical encryption,progressive hierarchical encryption and external filter hierarchical encryption.The rationality of the proposed scheme is verified by theoretical analysis and experimental simulation.The results show that the hierarchical encryption method has stronger confidentiality or lower resource consumption than the single encryption method.It performs well in cloud storage auditing and has practical significance.In the article,the above two schemes are discussed in detail in two chapters.Finally,the work of the full text is summarized,and the inadequacies of the paper and the direction of future research are put forward.