Research On 3D Model Copyright Authentication And Transaction System Based On Blockchain

With the advancement of computer image processing technology and the increasing demand for 3D models in various industries,3D models have been widely used in various fields.The 3D model is essentially a digital media file.The fast advancement of the Internet has offered a lots of expedience for the collaborative design of 3D models and the sharing of data and information.At the same time,it has also lowered the illegal threshold for illegal copying,tampering,and dissemination of 3D models.How to availably deter the lawless duplication,tampering and dissemination of 3D models and efficiently protect the legal rights of authors has become a very important issue.At present,the development of blockchain technology is becoming more and more mature,and the data on the chain can be used to have the characteristics of non-tampering and traceability,making the copyright authentication information and circulation information of the three-dimensional model more credible and transparent.In response to the above problems,this paper designs a blockchain-based threedimensional model copyright authentication and transaction system.The main work done in this paper is as follows:(1)Consensus algorithm for copyright protection of 3D models.Consensus algorithm,as a key technology based on blockchain,will directly determine the execution speed of the entire system.Aiming at the problem of high communication complexity of PBFT algorithm and random election of master nodes,this paper proposes an improved PBFT algorithm based on trust level(CL-PBFT).First,establish a node's trust level evaluation index system,then evaluate the node's trust level,and select nodes with higher trust levels to form a consensus node group.At the same time,the selection of the master node is also generated in the consensus node group.This method can be effective It reduces the communication complexity of the consensus process and the probability of the appearance of Byzantine nodes.Secondly,improvements are made to the view switching protocol to improve the efficiency of view switching.Experiments have verified that CL-PBFT is significantly better than PBFT in terms of throughput and latency in the consensus process.(2)Requirement analysis and functional design of 3D model copyright authentication and transaction system based on blockchain.In view of the problems that need to be solved in the copyright protection of 3D models,including copyright confirmation,copyright use rights,rights protection,copyright tracing,etc.First of all,this paper construes the work flow of the system,integrates the features of the work flow and blockchain,obtains the content of the system requirements and splits the some module.Then,the overall structure of the system is designed,separated into four layers,and the technical ingredients of each layer is explained.Finally,the functions contained in each functional module of the system are designed in detail,and the data entities involved in the system are analyzed and designed.(3)System implementation and deployment.in the light of the demand analysis and function design of the system above,the corresponding tools of technology are used to develop the various functions of the system.Finally,the establishment of the blockchain network environment and the deployment of system applications were completed,and the effectiveness of each function was verified.