Trusted Blockchain-Based Data Integrity Verification Model

Under the background of the development of new technologies such as the mobile Internet,Internet of things,and big data,the volume of business data has grown exponentially.Personal and enterprise existing storage devices can not meet the growing demand for storage,so people are increasingly using inexpensive cloud storage technology to solve this problem.However,there are many security issues in cloud storage technology.The integrity of data stored by users in the cloud is of concern.Researchers proposed multiple verification models for data integrity problems.Among the data integrity verification models that support public auditing,the credibility of the Third Party Auditor(TPA)has not been studied very well.The solution.The role of TPA in the public audit model is crucial.In the public audit model,users,TPAs,and cloud storage provider tripartite entities interact to complete the verification process.However,in actual situations,the TPA may conspire with any party during the tripartite interaction to deceive the other party and gain commercial benefits.In the cloud storage data integrity verification process,security issues such as untrusted TPAs are addressed.This dissertation starts with the design of a trusted third-party auditing agency and completes the integrity verification model of public audit data based on the trusted blockchain in cloud storage.The main work includes the following aspects: Designing a TPA alliance based on a trusted blockchain to ensure the trustworthiness and controllability of the TPA operating environment.Construct the logical framework structure of TPA,namely the operation layer of TPA and the block chain layer of TPA.The former guarantees the transparency of the TPA workflow;the latter can form a blockchain that proves that TPA is trusted.Finally,based on a trusted third-party auditing agency,a data integrity verification model based on a trusted blockchain is constructed.The experimental environment is set up to carry out experiments.The experimental results show that under the trusted execution environment,the model uses blockchain technology to ensure the transparency and traceability of the TPA audit process.In this way,the audit of the cloud storage provider was completed in the context of the TPA's honest audit,ensuring the integrity of cloud users' data in the cloud.