Data Integrity Verification Based On Partial Delegation And Blockchain Technology

In the information age we are in,with the popularity and maturity of cloud computing technology,the corresponding applications and services have emerged.Among them,cloud storage,as an important part of cloud computing,has become the mainstream storage data means of major enterprises.Compared with traditional data storage services,cloud storage has many advantages,for example,cheap storage costs,instant data sharing and recall,and massive storage space while traditional data storage don't possess.However,when this technology is developing rapidly,it also brings a series of problems.Users will worry about the security,privacy and integrity of cloud data.Especially for some large enterprises,data is the lifeline of the whole enterprise.Therefore,how to ensure the privacy and security of data when satisfying users' requirements for data storage is a key issue to be solved and valued by cloud storage technology applications.The research direction of this paper is based on the data integrity verification problem in cloud storage.The problem to be solved is to verify the integrity of the data in the cloud storage,whether it has been maliciously altered or deleted.We combine the two advanced technologies of the information age to apply them together,to achieve more optimized solutions,more efficient data integrity verification,and better protection of data privacy.Partial delegation technology has been improved on the basis of third-party audit verification data integrity,instead of completing the task for users who cannot perform data verification,the whole process is safe and efficient,and can be replaced at any time.After adding the blockchain technology,the third-party decentralization can be achieved,and the entire verification process is transparent,but it has higher security and reliability.The main works in this paper include:(1)A complete data validation model based on partial authorization is proposed.The data owner can verify the data in the cloud by means of key delivery without having to participate in the process.The whole process is efficient,safe and flexible.At the same time,the model has advantages in terms of revocation and replacement of agents.We have proved the effectiveness of the solution through correctness and security analysis.(2)A blockchain-based framework for Data Integrity Service is proposed.Under such framework,a more reliable data integrity verification can be provided for both the Data Owners and the Data Consumers,without relying on any Third Party Auditor(TPA).In this paper,the relevant protocols and a subsequent prototype system,which is implemented to evaluate the feasibility of our proposals,are presented.The performance evaluation of the implemented prototype system is conducted,and the test results are discussed.