Research On Secure Sharing Of Digital Education Resources Based On Blockchain And Access Control

The development of digital education is accelerated under the influence of the COVID-19 pandemic.People’s infinite demand for education promotes the rapid spread of digital educational resource data,which can overcome time and space barriers,but at the same time,infringement problems arise.With the gradual improvement of blockchain technology,it has been applied to various industries.When it is combined with digital educational resources,it can realize orderly dissemination of digital educational resources,transparent sharing path and copyright tracing.However,there is also the problem of user privacy data leakage due to data transparency on the chain.The current digital educational resource sharing environment is very complex,which can’t be dealt with by the traditional access control model.Although cloud services can achieve fine-grained access control,they face the problem of single point of failure.In addition,the massive digital education resource data is all stored on the blockchain although it is safe but the cost is high,and the use of cloud storage technology will bring data leakage,damage and other problems.Aiming at the above problems,the major research contents of this article are as follows:(1)This article analyzes the sharing demand of digital educational resources and designs a safe sharing model of digital education resource,which is based on block chain and access control technology.This model combines attribute-based encryption to achieve fine-grained access control to meet diverse digital education resource sharing scenarios,with blockchain network nodes serving as authorization centers,making it more secure compared to single authorization centers.It realizes the distributed storage of collaborative work on the chain and off the chain.The blockchain stores critical information of digital education resources,and Inter Planetary File System stores huge data of digital education resources to ensure data storage security and efficiency.(2)To address the issues of limited user computing capacity and high computational pressure on blockchain nodes,a CP-ABE algorithm supporting third-party pre-decryption is proposed,which supports retracting the attributes of the user and changing access policy.To prevent the third party from snooping user privacy,the real attributes of the user are hidden during the pre-decryption process.Consensus mechanism is used to ensure the consistency and security in the process of generating attribute keys and encrypting data from multiple authorization centers.Finally,the algorithm is tested and analyzed in different software environments.(3)The digital educational resource sharing platform is built in a modular way.The smart contract is developed and deployed on the blockchain network.The back-end realizes data interaction with the blockchain network and the front-end through interfaces.This platform combines blockchain,access control,attribute-based encryption,and distributed storage technology to implement a secure sharing scheme for digital education resources,achieving the goal of secure and orderly dissemination of resource data.