Research On NFT Storage And Copyright Protection Method Based On Blockchain

In the context of building a strong information technology country,General Secretary Xi Jinping proposed the development goal of "taking blockchain as an important breakthrough in independent innovation of core technologies and accelerating the development of blockchain technology and industrial innovation".With the continuous development of blockchain technology,scholars and experts have proposed the blockchainbased Non-Fungible Token(NFT)technology,which solves the pain point that digital artworks are not unique and provides a technical guarantee for the scarcity of digital artworks based on the characteristics of blockchain data immutability,which has attracted worldwide attention.attention.However,with the continuous development in recent years,copyright dispute problems and blockchain security problems in NFT projects occur frequently,especially in scenarios with fewer nodes,the blockchain is more vulnerable to attacks,which brings obstacles to the development of NFT technology.The main work of this paper is as follows:To solve the problem that it is difficult for the defender to confirm the copyright ownership in the copyright dispute of NFT images,an improved copyright protection method for NFT images based on multiple swarm genetic algorithms is proposed.Combining digital watermarking and blockchain,and improving the digital watermarking algorithm by multiple swarm genetic algorithms,we use the tamper-evident feature of blockchain data as a trusted third party for digital watermarking to confirm the copyright of NFT images.According to the different needs of today’s NFT users and platforms,the NFT smart contract is designed based on the ERC-721 standard to realize the functions of NFT creation,owner change,and authorization agent.It also introduces IPFS,which reduces the cost of using blockchain and the coupling of the system.After comparative experimental analysis,the improved digital watermarking algorithm in this paper has an improvement in invisibility and robustness,and the method has a certain feasibility.To solve the NFT storage security problem caused by the blockchain security issue,the Po SNR consensus algorithm improved based on the proof-of-interest algorithm is proposed.The bookkeeping interests of each node are redistributed according to the number of nodes in the blockchain,and the bookkeeping nodes are no longer selected exclusively based on the number of tokens pledged by nodes,which increases the cost of malicious nodes to attack the blockchain network and improves the security of the blockchain network and the balance of nodes’ bookkeeping authority in the scenario of fewer nodes.In the consensus stage of bookkeeping nodes,the performance of blockchain is improved by selecting multiple bookkeeping nodes to out blocks sequentially.After comparative experimental analysis,Po SNR algorithm can improve the security and bookkeeping authority balance of the blockchain network,and has better performance in the scenario with multiple nodes.