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XOR Mixup — TensorFlow experiment codes (FL' ICML 2020)

: Privacy-Preserving Data Augmentation for One-Shot Federated Learning

Paper | Presentation

XOR Mixup: Privacy-Preserving Data Augmentation for One-Shot Federated Learning<br> MyungJae Shin (SNUH), Chihoon Hwang (CAU), Joongheon Kim (Korea), Jihong Park(Deakin), Mehdi Bennis(Oulu), Seong-Lyun Kim(Yonsei)

Abstract User-generated data distributions are often imbalanced across devices and labels, hampering the performance of federated learning (FL). To remedy to this non-independent and identically distributed (non-IID) data problem, in this work we develop a privacy-preserving XOR based mixup data augmentation technique, coined XorMixup, and thereby propose a novel one-shot FL framework, termed XorMixFL. The core idea is to collect other devices' encoded data samples that are decoded only using each device's own data samples. The decoding provides synthetic-but-realistic samples until inducing an IID dataset, used for model training. Both encoding and decoding procedures follow the bit-wise XOR operations that intentionally distort raw samples, thereby preserving data privacy. Simulation results corroborate that XorMixFL achieves up to 17.6% higher accuracy than Vanilla FL under a non-IID MNIST dataset.

Citation

@article{shin2020xor,
  title={XOR Mixup: Privacy-Preserving Data Augmentation for One-Shot Federated Learning},
  author={Shin, MyungJae and Hwang, Chihoon and Kim, Joongheon and Park, Jihong and Bennis, Mehdi and Kim, Seong-Lyun},
  journal={arXiv preprint arXiv:2006.05148},
  year={2020}
}

Author

MyungJae Shin, Chihoon Hwang