Research On The Application Of Blockchain Technology In Digital Rights Management And Searchable Encryption

Blockchain is a super ledger that can assemble data blocks into a specific data structure in a chain way according to the time sequence,and provide decentralized and transparent data sharing.It has the characteristics of decentralization,collective maintenance,security and credibility,timing data and support for smart contracts,which can realize the point-to-point circulation and transfer of value in the Internet without trusted third parties.Therefore,blockchain can be applied in the field of value circulation between institutions to solve the problem of trust between institutions.In addition,blockchain has the characteristics of supporting smart contracts,which allow trusted transactions without a third party,and automatically execute on each node in the network in a specified way according to the data in the triggered transactions.Therefore,blockchain can also be used in areas where there are transaction fairness problems between institutions.Therefore,this paper first combined with the blockchain technology to conduct in-depth research in the field of digital rights management with value circulation;then,this paper uses the blockchain technology to try to solve the fairness problem in the retrieval scheme for ciphertext in the cloud storage environment.The specific work of this paper is as follows:1.Digital rights management(DRM)is a mechanism to protect digital content from being abused by controlling and transferring the use rights of digital content.However,there are still some shortcomings in traditional DRM system,such as centralization,non transparency of transaction information and rights information.Centralized servers are vulnerable to attack,and opaque information is not friendly to users.Blockchain has the characteristics of decentralization,collective maintenance,security and trust,and support for smart contracts,which provides a good solution to the problems existing in the traditional DRM system.Therefore,this paper makes an in-depth study on the field of digital rights management,proposes a digital rights management scheme based on blockchain,realizes thefunction of license issuing and rights trading without any centralized server,and records the transaction information and rights information on the blockchain to ensure the reliability and transparency of information.In addition,the scheme also realizes fine-grained access control and flexible use control of digital content.Finally,the security and performance analysis show that our scheme is safe and feasible.2.In the cloud storage environment,there is a problem of unfair transaction in the retrieval scheme of ciphertext.Therefore,this paper uses blockchain and smart contract to try to solve the fairness problem of ciphertext retrieval scheme in cloud storage environment,and proposes a fair searchable encryption scheme based on blockchain,which not only ensures data privacy,but also solves the fairness problem of retrieval.Finally,the results of security and performance analysis show that the scheme is feasible.