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

Abstract

The invention relates to a data processing method, system and device based on a node group and a medium. The method is executed by one first node in a node group, and comprises the following steps: constructing a mapping relationship according to a local first user identifier, wherein the mapping relationship is used for mapping the first user identifier into a target value; carrying out homomorphic encryption on the mapping parameters of the mapping relation to obtain a mapping parameter ciphertext, and transmitting the mapping parameter ciphertext to a second node in the node group; receiving a reference value and fragment information correspondingly fed back by the second node; when a result obtained after homomorphic decryption is performed on the reference value is consistent with a target value, retaining the fragment information fed back corresponding to the reference value, triggering one of the first nodes in the node group to collect the fragment information retained in eachof the first nodes, and performing aggregating according to the collected fragment information to obtain a user identifier intersection between the nodes in the node group and aggregating user data corresponding to the user identifier intersection. According to the method, the data security during intersection solving of multi-party data can be ensured.

Description

technical field [0001] The present application relates to the field of computer technology, in particular to a node group-based data processing method, device, device and medium. Background technique [0002] With the development of computer technology, it is more and more common to process data on the Internet. Private set intersection is one of the basic issues in the field of secure multi-party computing. For several participants, each party has a private data set. The goal is to make All parties learn the public intersection of these sets, while ensuring that the content of non-intersections is not leaked. [0003] In the traditional technology, a third party such as a gateway or a 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, w...

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