【摘要】 为解决异构区块链数据隐私安全问题，文章在知识付费应用场景下提出一种支持异构多链的数据隐私保护方案，实现了联盟链上知识分享及公有链上知识付费。方案采用IPFS系统存储知识文件，解决了区块链存储负载过重问题。此外，为避免传统公钥加密机制加密次数多、需多次重复对数据进行加密上链的问题，方案利用代理重加密技术实现参与方之间的数据共享。最后，文章从理论和实验两方面对方案进行了正确性、安全性和性能分析。更多还原

【Abstract】 In order to solve the problem of heterogeneous blockchain data privacy security, under the application scenario of knowledge payment, this paper proposed two data privacy protection schemes that support heterogeneous multi-chain, realizing knowledge sharing in the alliance chain and knowledge payment on the public chain. In the scheme, IPFS system was used to store knowledge files, which solved the problem of overloaded blockchain storage. In addition, in order to avoid the problem that the traditional public key encryption mechanism encrypts data for many times and repeatedly encrypts the data on the chain, this scheme used proxy re-encryption technology to achieve data sharing between the two parties involved. At the end of the paper, the author analyzed the security and performance of the method proposed in this paper from both theoretical and practical aspects.更多还原