Research on the trustworthiness and security of inclusive financial services based on blockchain

With the wide application of cloud computing, data sharing has become the norm, but it also brings challenges of data security and privacy protection. This paper proposes a cloud data sharing model based on blockchain, which adopts a double -layer structure of private chain and public chain to ensure that data is stored safely in the private chain. The block of the private chain is stored through the public chain, and the smart contract is used for calculation, and only the data results are returned, w hich effectively prevents the disclosure of sensitive data. In addition, through the metadata specification query and parse data, the query results can be verified, which enhances the credibility of the data. In this paper, the identity-based public key encryption algorithm is used to improve the encryption performance without public key certificate au thentication. The feasibility of the scheme is verified by simulation experiments, and the effectiveness of the system is proved by the application scenario of "financial supermarket". The system provides a high adaptability solution for inclusive finance, which not only ensures the security and credibility of data, but also realizes multi-party secure data sharing, helps to optimize the allocation of financial resources, breaks through the information asymmetry problem of traditional inclusive finance, and provides a new research direction for the credibility and security of financial services.