Research On Behavior Auditing Scheme Of Log Based On Blockchain

Using cloud storage services,users can store their data remotely and get high-quality services from a shared pool of configurable computing resources without the need for local data storage and maintenance.However,outsourcing data brings convenience to users.On the other hand,data is no longer under control.Users will worry about the security of outsourced data and whether the cloud server will damage or leak data.The relationship between users and untrusted cloud service providers has limited the development of cloud storage technologies.Therefore,public auditing of cloud storage services is crucial,and users can request auditing of cloud data when they are in need.Thus even if the cloud service provider is not fully trusted,there is no need to worry about data security.This paper proposed a new blockchain-based behavior audit model based on logs,taking advantage of blockchain's decentralization and de-trusting.By keeping the log records in the blockchain instead of the cloud storage,the log records' integrity and security are guaranteed.And we have proposed a secure data access protocol for user and cloud storage provider.This protocol guarantees that both users and cloud storage will log the log in the blockchain network,and they cannot denounce and tamper the log records.Finally,we designed a cloud operation behavior auditing system based on this model and implemented it.We also provide three public auditing interfaces to detect illegal users separately.,audit data integrity and track file lifecycles.Through experiments,it can be found that the percentage of time overhead of the audit operation is gradually reduced as the data itself increases.