Research On Multimedia Resource Rights Confirmation And Secure Transaction Technology Based On Blockchain

With the rapid development of the Internet,smart phones and social networks have penetrated into every aspect of people's lives,and multimedia resources such as images and short videos are being generated all the time.Multimedia resources,as digital products,have value in themselves and can be circulated through transactions to obtain benefits.The existing centralized multimedia resource transaction method has the risks of untrustworthy third parties and unrecoverable data loss,and the characteristics of easy forwarding,copying,and editing of multimedia resources also lead to problems such as difficulty in confirming rights and difficult protection of rights and interests,the problems of transaction security and information privacy protection also need to be solved urgently.Not only that,the centralized multimedia resource transaction model lacks an objective resource pricing mechanism,the price is completely determined by the resource owner,and the platform will also charge a certain transaction fee,which reduces the enthusiasm of users for transactions.Blockchain technology provides a new solution for the centralized transaction scheme.Its decentralized,traceable and tamper-proof technical characteristics can provide a new entry point in the secure transaction of multimedia resources,and can introduce the longawaited transparency in the confirmation of rights.Based on the existing secure transaction scheme of multimedia resources based on blockchain,this paper studies the rights confirmation and security and privacy protection in multimedia resource transaction.The main work is as follows:(1)In view of the problem that untrusted third parties tamper with the contents of the certificate and disclose users' privacy in traditional multimedia resource transaction schemes,which reduces the credibility of the certificate of confirmation of rights,this paper introduces blockchain technology into the certificate of multimedia resource confirmation information.Combined with Anti-Collusion Code based on Balanced Incomplete Block Design(BIBDACC)and asymmetric fingerprint scheme based on homomorphic encryption,a transaction right confirmation scheme based on blockchain is designed.The scheme uses trusted execution environment combined with smart contract to realize two-stage detection process,uses distributed storage system IPFS to store multimedia resources with large amount,and uses secret sharing scheme to realize secure download of multimedia resources.(2)A secure transaction scheme of multimedia resources based on dual-chain in blockchain is proposed.In the scheme,the third-party agents is introduced into the solution for subcontracting transactions.Based on the Fabric of the consortium blockchain,a dualchain trading architecture is designed to realize the function division of the ledger,and intermediate nodes are used to realize the transaction interaction across the ledger,which to some extent protects the data privacy security of the transaction participants.In the sidechain,Rubinstein bargaining game model is used to realize the reasonable pricing mechanism of multimedia resources and protect the interests of both parties.The main-chain realizes the secure transaction of multimedia resources and the confirmation information storage,and designs the distribution mechanism based on seed copy.Finally,we design a confirmation detection algorithm based on the dual-chain,.(3)In order to solve the problem of easy leakage of user privacy information due to the open and transparent nature of smart contracts,the trusted execution environment SGX is built on the trusted node to run the smart contract involving privacy data calculation in Enclave to ensure the privacy and security of transaction information.The Enclave destroys the data after each calculation,and the smart contract only stores and sends the calculation results,ensuring confidentiality and security in the execution of the smart contract.(4)To demonstrate the effectiveness and feasibility of the proposed scheme,this paper tests performance metrics in different blockchain networks,including Gas consumption,execution time of smart contract functions,and TPS comparison of dual-chain and singlechain throughput.In this paper,we test the communication time of Rubinstein computing Nash equilibrium recommended price in SGX and smart contract,and make a detailed comparison and analysis with existing similar schemes including computational complexity.Experimental results show that the proposed scheme can effectively realize the right confirmation process while ensuring secure and efficient trading of multimedia resources.