Research On Blockchain-based Cloud Storage Data Integrity Detection

For the research of cloud storage data integrity detection,most of the traditional solutions are based on the ”challenge-response” mechanism.Such solutions require the cloud to participate in the calculation and provide a special interface,which is unrealistic for current commercial cloud storage,and the data returned by the cloud is difficult to guarantee credibility.In some schemes,a trusted third party is used to share the computing and communication costs,but the addition of a third party will cause the risk of collusion attack.In order to solve some problems in the existing research,this thesis takes blockchain and cloud storage data integrity detection as the key research content,combining the decentralization and irreversible characteristics of blockchain with data integrity detection.The main The innovations are as follows:1.A method of combining blockchain and data integrity detection technology to implement cloud storage data integrity detection is proposed.This method is based on the decentralization of the public blockchain and the irreversible characteristics of the data,which provides credibility for the storage of detection data,and solves the problem of third-party collusion attacks in traditional detection methods.2.Second,the architecture method of the middle layer of the data integrity detection system is proposed.This method uses the middle layer to realize the interaction between the system and the cloud and the blockchain,so that each participant in the scheme design is relatively independent,and solves the problem of relying on the ”challenge-response”mechanism.The thesis designs and implements a blockchain-based cloud storage data integrity detection prototype system based on the research content,and performs functional and performance tests on it.The experimental results show that the middle layer architecture designed and implemented by combining blockchain in the thesis can effectively detect the integrity of cloud data.In addition,the architecture design of the middle layer makesWith the continuous development of cloud storage technology,the security threats to cloud data are also increasing.Due to the cloud storage model,the control of user data is transferred to the cloud.When the cloud storage server encounters security problems,the user's cloud data integrity will be seriously threatened.the detection system not require special technical support from the cloud,nor need to build special blockchain system and blockchain transaction information,only need to provide file upload and download interfaces in the cloud,and the blockchain network which can perform intelligence contract,this solution can be used for cloud data integrity detection,with good portability.