Research On Key Technologies Of Digital Copyright Protection Based On Blockchain

DRM is to protect digital assets from the generation,distribution,confirmation and use of digital rights.According to research,using the characteristics of blockchain technology can save copyright registration fees,shorten the registration period,speed up the time for right confirmation,and strengthen the protection of the rights of copyright owners.Although the introduction of blockchain technology has so many advantages,there are still some problems,including large-scale node and system balance problems,digital works storage centralization problems,system performance bottlenecks caused by the characteristics of blockchain consensus,and the privacy information protection of the disclosure of the copyright owner’s real ip address and the disclosure of his personal identity information.In order to solve the above-mentioned problems,this thesis has made the following research:1.In order to improve the large-scale node and system balance problem and the system performance bottleneck problem caused by the characteristics of blockchain consensus,this paper proposes a Message Passing Interface-K-Medoids-PBFT(MPI＿K＿PBFT)consensus algorithm.The idea of algorithm improvement is a hierarchical consensus,which is broken into zero.When the K-Medoids algorithm stratifies the consensus nodes,it first samples individuals to initialize and focus.Secondly,in the process of optimizing the clustering by using the master-slave mode,using the characteristics of the K-Medoids algorithm,the clustering part that is the first to reach a steady state is extracted,and it does not participate in the next round of iterations,reducing huge repetitive calculations.Finally,the idea of hierarchical consensus is adopted to share the consensus pressure and reduce the communication overhead of the consensus process.After experimental analysis,the algorithm in this paper has a relatively good performance in terms of consensus delay,throughput and communication overhead when dealing with larger-scale nodes.2.In order to solve the problem of the centralization of digital works storage,the disclosure of the true IP address of the copyright owner,and the disclosure of his personal identity information,this paper proposes a privacy protection scheme based on the step-bystep processing of anonymous communication and user data.In an anonymous communication system,a rerouting path selection algorithm based on packet forwarding is proposed.First,the nodes in the system are grouped,and at most one node is selected for each group,which avoids the possibility of loops during the path construction process.This undoubtedly improves the anonymity of the system.At the same time,due to the forwarding mechanism,the rerouting path from S to R will be shortened with high probability.The simulation experiment proves that the algorithm proposed in this paper has good results in terms of anonymity and algorithm performance.At the same time,a privacy protection method for user data step-by-step processing is proposed,which uses the storage advantages of Inter Planetary File System(IPFS)technology to make up for the lack of block capacity of blockchain technology and the defects of over-transparency of information on the chain.