A method and device for community division based on feature matching network

Abstract

The embodiments of the present invention relate to the field of data processing, and in particular to a community division method and device based on a feature matching network, which are used for community division. In the embodiment of the present invention, according to the preset K hash functions, the K-bit hash vector corresponding to each account information is determined; the hash vector corresponding to each account information is sequentially divided into m=K / k categories Hash vector; for each class, divide the account information with the same sub-hash vector into the same group; calculate the similarity between the account information in the same group; if the similarity between the account information is greater than the threshold, then Establish interconnection edges between each account information to form a feature matching network; according to the feature matching network, each account information is divided into communities, and then community analysis can be performed based on the divided communities to find abnormal communities.

Description

technical field [0001] The embodiments of the present invention relate to the field of data processing, and in particular to a method and device for community division based on a feature matching network. Background technique [0002] At present, the risk situation faced by the domestic credit card market is becoming more and more serious, and the cases of credit card cashing out, counterfeit card fraud, and card theft fraud are increasing. Specifically, credit card cashing out refers to cardholders obtaining cash after swiping their cards through false consumption transactions or colluding with merchants. Subsequent refunds or purchases of products that are easy to realize and then sell them to obtain cash, etc. Counterfeit card fraud refers to the fraudulent behavior of writing magnetic stripes in accordance with the magnetic stripe information format of bank cards, embossing or flat printing forged real and effective bank cards for transactions; card theft Fraud refers to...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a community division method and device based on a feature matching network to solve the problem in the prior art that if data is subsequently added to the anti-fraud model, it is difficult to update the data of the anti-fraud model, and after clustering, the group The structures within and the relationships between structures remain difficult to describe

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