Risk data sharing method and system based on secure multi-party computing and block chain

Abstract

The invention discloses a risk data sharing method and system based on secure multi-party computing and a blockchain, and the method comprises the steps: obtaining a user node ID, calculating a hash value of the user node ID, and querying the historical loan information of a user node according to the hash value; acquiring a historical loan amount private certificate of the user node, and calculating an overdue amount private certificate and an overdue duration private certificate by utilizing a private key of the user node and the acquired historical loan information; constructing a user nodeloan overdue amount multi-party security certificate and an overdue duration multi-party security certificate; sharing the processed loan information obtained by query to a request node. According tothe method, risk control data alliance co-construction of multiple Internet financial institutions is achieved through secure multi-party calculation, and distributed real-time secure calculation isperformed under the condition that original data is not delivered, so that the freshness, effectiveness and accuracy of the data are ensured, and therefore, business and data security is ensured to the greatest extent and supervision requirements are met.

Description

technical field [0001] The present invention relates to the field of information technology, and more specifically, to a risk data sharing method and system based on secure multi-party computing and blockchain. Background technique [0002] Data is the cornerstone to support the entire Internet financial risk control. Mutual Finance Company collects, organizes, and cleans customer information, and uses big data technologies such as user portraits, data mining, and deep learning to identify customers' fraud risks. In order to reduce the overdue bad debt rate of risk control for financial companies, complete user data will obviously provide great help, and at the same time, it will also have guiding significance for users to differentiate and adapt to different risk interest rate products. [0003] As a distributed ledger technology, blockchain technology has had a profound impact on the financial field and drives a new round of technological and application changes. Against ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the sharing of sensitive information in the blockchain environment in the background technology will directly or indirectly lead to the leakage of user privacy, the present invention provides a risk data sharing method and system based on secure multi-party computing and blockchain. Risk data sharing methods based on secure multi-party computing and blockchain include:

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