Research On Blockchain Consensus Mechanism For Cloud Computing

As an important service model that provides computing resources to users as a service,cloud computing services are responsible for ensuring the security and immutability of traceability data,such as user usage records and billing details,provided by users.In many fields,such as logistics,medical services,and other cloud computing information service platforms,there is also the problem of multi-party data trust between users and users,and between users and platforms.Blockchain technology has become an important means to solve the above data storage and sharing problems due to its excellent characteristics.The core of blockchain technology is consensus.The size and security of its resource overhead will directly affect the efficiency and stability of the blockchain system.Therefore,it is the main content of this paper to take the consensus mechanism as the entry point and optimize the resource overhead and security aspects of the cloud blockchain system.First,in the cloud data traceability model to which blockchain technology is applied,the native consensus algorithm consumes a lot of resources,which leads to its weak ability to support a large number of nodes.A Cloud Delegated Proof of Stake(Cloud DPo S for short)consensus algorithm is proposed.This consensus algorithm is a cloud consensus algorithm supported by a large number of nodes.In order to reduce the consumption of resources,a method for selecting consensus nodes is introduced.A comparative experiment of the consensus efficiency and resource consumption with the consensus algorithm in the same application scenario proves that the consensus algorithm has low resource consumption and efficient consensus capability under a large number of nodes.Secondly,a Cloud Security Consensus Model(CSCM for short)is proposed to reduce the resource consumption of traditional consensus algorithms,improve their adaptability in the cloud,and lead to the problem of node abuse caused by power concentration.This model is a universal model based on prestige rewards and punishments.At the same time,a node replacement mechanism is introduced to guarantee the fault tolerance of the consensus process.The performance comparison experiment and multiple sets of security verification experiments after embedding the existing consensus algorithm have proved the efficiency of the consensus model and the effectiveness of the security mechanism.