FedPNN: One-shot Federated Classification via Evolving Clustering Method and Probabilistic Neural Network hybrid

• URL: http://arxiv.org/abs/2304.04147v1
• Date: Sun, 9 Apr 2023 03:23:37 GMT
• Title: FedPNN: One-shot Federated Classification via Evolving Clustering Method and Probabilistic Neural Network hybrid
• Authors: Polaki Durga Prasad, Yelleti Vivek, Vadlamani Ravi
• Abstract summary: We propose a two-stage federated learning approach toward the objective of privacy protection. In the first stage, the synthetic dataset is generated by employing two different distributions as noise. In the second stage, the Federated Probabilistic Neural Network (FedPNN) is developed and employed for building globally shared classification model.
• Score: 4.241208172557663
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Protecting data privacy is paramount in the fields such as finance, banking, and healthcare. Federated Learning (FL) has attracted widespread attention due to its decentralized, distributed training and the ability to protect the privacy while obtaining a global shared model. However, FL presents challenges such as communication overhead, and limited resource capability. This motivated us to propose a two-stage federated learning approach toward the objective of privacy protection, which is a first-of-its-kind study as follows: (i) During the first stage, the synthetic dataset is generated by employing two different distributions as noise to the vanilla conditional tabular generative adversarial neural network (CTGAN) resulting in modified CTGAN, and (ii) In the second stage, the Federated Probabilistic Neural Network (FedPNN) is developed and employed for building globally shared classification model. We also employed synthetic dataset metrics to check the quality of the generated synthetic dataset. Further, we proposed a meta-clustering algorithm whereby the cluster centers obtained from the clients are clustered at the server for training the global model. Despite PNN being a one-pass learning classifier, its complexity depends on the training data size. Therefore, we employed a modified evolving clustering method (ECM), another one-pass algorithm to cluster the training data thereby increasing the speed further. Moreover, we conducted sensitivity analysis by varying Dthr, a hyperparameter of ECM at the server and client, one at a time. The effectiveness of our approach is validated on four finance and medical datasets.

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