Cloud-edge Collaborative Security Data Sharing And Computing Method Based On Blockchain

In the traditional blockchain-based cloud-side data sharing system,blockchain is usually only applied in the cloud or the edge side,or used as a third-party certificate tool to solve the problem of mutual trust between the two sides of the cloud side,which has the problems of high system overhead and low efficiency of system data sharing.Therefore,this paper proposes a cloud-edge collaborative security data sharing and calculation method based on blockchain.Different from the traditional blockchainbased cloud-edge collaborative data sharing system,this method fully deployed the blockchain on both sides of the cloud server and the edge device,guaranteed the competition opportunities for each system to participate in the entity,increased the efficiency of system data sharing,and reduced the system overhead.And effectively play the blockchain’s advantages of openness and transparency,while optimizing the efficiency of system data sharing,ensure the data security of the cloud-edge collaborative process,and improve the degree of mutual trust between the entities involved in the system.The main research contents of this paper are as follows:(1)Aiming at the low efficiency of comprehensive data sharing in the existing cloud-edge data sharing system,this paper makes an in-depth analysis of the existing cloud-edge blockchain application scenarios,and tries to add the system participants in the cloud-edge collaboration to the data computing network in the form of blockchain nodes.By designing and writing smart contracts to achieve the functions of the blockchain system.Based on this,a set of cloud edge collaborative data sharing and computing system based on blockchain is designed.Experimental results show that,compared with the traditional edge cloud data sharing system based on blockchain,the proposed method improves the comprehensive efficiency of the cloud edge collaborative system by about 5% when the number of tasks reaches a certain value,and has better performance under high system load.Meanwhile,the load imbalance of the proposed method is lower,indicating that the proposed method has better task scheduling capability.(2)Based on the above proposed blockchain-based cloud-edge collaborative data sharing and computing system,this paper further considers the problem that data privacy is not guaranteed in the process of data sharing by the current method.Combining homomorphic encryption algorithm,obfuscated address and ring signature,a scheme of original data security upload is proposed,and on this basis,a new optimization system based on original data security upload scheme is designed.Through the algorithm correctness analysis,the correctness of the improved homomorphic encryption algorithm is proved.Through the algorithm performance analysis,the superiority of the improved homomorphic encryption algorithm is estimated.Through the system security analysis,it is concluded that this system can fully guarantee the privacy security and asset security of system participants.It is concluded that the improved homomorphic encryption algorithm used in this paper improves the data decryption speed about 19% compared with the traditional homomorphic encryption algorithm.