Data processing method, system, device and medium based on node group

Abstract

The present application relates to a node group-based data processing method, system, device and medium. The method is executed by one of the first nodes in the node group, and includes: constructing a mapping relationship according to the local first user identifier; the mapping relationship is used to map the first user identifier to a target value; performing homomorphism on the mapping parameters of the mapping relationship Encrypt to obtain the mapping parameter ciphertext, and pass the mapping parameter ciphertext to the second node in the node group; receive the reference value and fragment information corresponding to the feedback of the second node; when the reference value is homomorphically decrypted, the result and the target value When it is consistent, retain the fragment information fed back corresponding to the reference value, and trigger one of the first nodes in the node group to collect the fragment information retained in each first node, so as to aggregate the collected fragment information to obtain the information of each node in the node group. The intersection of user IDs among them, and the user data corresponding to the intersection of aggregated user IDs. This method can ensure data security when intersecting multi-party data.

Description

Technical field[0001]This application relates to the field of computer technology, in particular to a data processing method, system, equipment and medium based on a node group.Background technique[0002]With the development of computer technology, it is more and more common to process data on the Internet. Privacy set intersection is one of the basic issues in the field of secure multiparty computing. For several participants, each party has a private data set. The goal is to let All participants are informed of the public intersection of these sets, and at the same time ensure that the content of non-intersections is not leaked.[0003]In traditional technology, a third party such as a gateway or control center is usually introduced to perform operations such as encryption and decryption and save intermediate results through the third party. However, in actual situations, it is difficult to find a suitable trusted third party, and the third party has too much access to private data, ...

AI Technical Summary

Problems solved by technology

However, it is difficult to find a suitable trusted third party in actual situations, and the third party has too much access to private data, which can easily cause security risks

Images