A digital diploma verification and sharing scheme based on Blockchain

Currently, Some educational institutions are gradually offering online learning resources, With large number of digital diplomas, Because of the insecurity of the privacy nature of the digital diploma itself, And the different institutions that may not recognize each other's diplomas, Bringing on a series of challenges, The invariance and privacy of blockchain provides a solution to the circulation of digital diplomas, Constructing a digital diploma sharing scheme based on alliance chain technology, Using a distributed file system, storage schemes, Addressing the range of challenges facing centralized storage or traditional cloud storage — illegal tampering or deletion, Thus, the distributed trust mechanism of digital diploma is realized. In addition, in order to relieve the chain storage pressure of the digital diploma stored in the blockchain, the digital diploma file itself is stored in the IPFS (InterPlanetary File System) to store the summary value of the digital diploma into the blockchain, effectively alleviating the chain storage pressure. At the same time, digital diploma has the need of confidentiality and signature recognition. The proposed scheme is suitable for digital diploma blockchain system through anonymous authentication and encryption by using multi-center ring signature encryption scheme, and hardly affects the speed of alliance chain blockchain generation.