Research On Digital Copyright Registration Technology Based On Blockchain

Centralized copyright registration based on third-party organizations has problems such as inefficiency and insecure data storage.The blockchain due to its decentralization and not tampering provides a new solution to the problems in the current digital copyright field.This thesis mainly studies the digital copyright registration technology based on the Hyperledger Fabric(blockchain 3.0)with high performance and identity authentication as the basic platform.The main work is as follows:(1)Design a copyright registration structure based on the Hyperledger Fabric.Firstly,user completes the account registration and obtains the identity certificate through the Member Service Provider of the Hyperledger Fabric.Secondly,in order to ensure the information can't be tampered,the information is signed combination with the signature technology.Then,the certificate authentication mechanism of the Hyperledger Fabric is used to perform identity verification and signature verification for the information,and a read-write set of the copyright registration information is generated.Finally,the copyright registration information is stored through sorting and confirmation.(2)A privacy protection scheme based on hash encryption is designed for the problem of blockchain of the openness and transparency.Without affecting the consensus of the blockchain,the transaction process of the Hyperledger Fabric is improved,and the scheme can achieve maximum privacy protection with fewer resource consumption.Compared to other solutions,the solution does not involve key management issues,nor does it require third-party components,with only 1.25%registration throughput while implementing privacy protection.(3)Aiming at the problem of system performance bottleneck caused by the proposal distribution method of the default endorsement strategy of the Hyperledger Fabric,a proposal distribution scheme based on virtual node mechanism is designed.In order to guarantee the success rate of endorsement and improve the efficiency of endorsement as much as possible,the scheme is improved from distributing to all Endorsers to select partial Endorsers processing proposals based on virtual nodemechanism.Under the premise that the endorsement success rate only decreased by 1%,the program increased registration throughput by 25% and registration delay by 18.5%.(4)Develop a digital copyright registration system based on the Hyperledger Fabric source code.Firstly,use the go language to implement the copyright registration contract.Secondly,modify the Hyperledger Fabric transaction processing source code to achieve privacy protection.Then,the contract calling module is modified to improve the proposal distribution method of the default endorsement strategy.Finally,the proposed scheme is verified and tested in this prototype system.