After studying the current state of digital diplomas applications,some problems with digital diplomas are found,such as privacy issues and the possibility that different institutions may not recognize each other's diplomas.Blockchain provides a solution for the circulation of digital diplomas.Based on the consortium chain,a distributed file storage system scheme was used to construct a digital diploma sharing scheme.To alleviate the pressure of blockchain storage,the digital diploma file was stored in the InterPlanetary file system(IPFS),and the summary value of the digital diploma was sent to the consortium chain,effec-tively alleviating the pressure of chain storage.The proposed scheme was suitable for anonymous authentication and encryption by using a multi-center ring signage scheme,which was suitable for the digital diploma blockchain system.The addition of ring signing almost did not affect the speed of block generation in the consortium chain.
关键词
数字文凭/区块链/分布式存储/隐私保护/环签名/在线教育/匿名认证
Key words
digital diplomas/blockchain/distributed storage/privacy protection/ring signature/online education/anonymous authentication
维普
万方数据