Optimization of Personal Credit Evaluation Based on a Federated Deep Learning Model

Shengdong Mu, Boyu Liu (), Chaolung Lien and Nedjah Nadia
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Shengdong Mu: Collaborative Innovation Center of Green Development, Wuling Shan Region of Yangtze Normal University, Fuling, Chongqing 408100, China
Boyu Liu: School of Innovation and Entrepreneurship, Hubei University of Economics, Wuhan 430000, China
Chaolung Lien: Department of Business Administration, International College, Krirk University, Bangkok 10220, Thailand
Nedjah Nadia: Department of Electronics Engineering and Telecommunications, State University of Rio de Janeiro, Rio de Janeiro 205513, Brazil

Mathematics, 2023, vol. 11, issue 21, 1-18

Abstract: Financial institutions utilize data for the intelligent assessment of personal credit. However, the privacy of financial data is gradually increasing, and the training data of a single financial institution may exhibit problems regarding low data volume and poor data quality. Herein, by fusing federated learning with deep learning (FL-DL), we innovatively propose a dynamic communication algorithm and an adaptive aggregation algorithm as means of effectively solving the following problems, which are associated with personal credit evaluation: data privacy protection, distributed computing, and distributed storage. The dynamic communication algorithm utilizes a combination of fixed communication intervals and constrained variable intervals, which enables the federated system to utilize multiple communication intervals in a single learning task; thus, the performance of personal credit assessment models is enhanced. The adaptive aggregation algorithm proposes a novel aggregation weight formula. This algorithm enables the aggregation weights to be automatically updated, and it enhances the accuracy of individual credit assessment by exploiting the interplay between global and local models, which entails placing an additional but small computational burden on the powerful server side rather than on the resource-constrained client side. Finally, with regard to both algorithms and the FL-DL model, experiments and analyses are conducted using Lending Club financial company data; the results of the analysis indicate that both algorithms outperform the algorithms that are being compared and that the FL-DL model outperforms the advanced learning model.

Keywords: federated learning; deep learning; personal credit assessment; optimization (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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