Paper ID | MLR-APPL-IVSMR-2.8 | ||
Paper Title | RETHINKING TRAINING SCHEDULES FOR VERIFIABLY ROBUST NETWORKS | ||
Authors | Hyojun Go, Junyoung Byun, Changick Kim, Korea Advanced Institute of Science and Technology, Republic of Korea | ||
Session | MLR-APPL-IVSMR-2: Machine learning for image and video sensing, modeling and representation 2 | ||
Location | Area D | ||
Session Time: | Tuesday, 21 September, 15:30 - 17:00 | ||
Presentation Time: | Tuesday, 21 September, 15:30 - 17:00 | ||
Presentation | Poster | ||
Topic | Applications of Machine Learning: Machine learning for image & video sensing, modeling, and representation | ||
IEEE Xplore Open Preview | Click here to view in IEEE Xplore | ||
Abstract | New and stronger adversarial attacks can threaten existing defenses. This possibility highlights the importance of certified defense methods that train deep neural networks with verifiably robust guarantees. A range of certified defense methods has been proposed to train neural networks with verifiably robustness guarantees, among which Interval Bound Propagation (IBP) and CROWN-IBP have been demonstrated to be the most effective. However, we observe that CROWN-IBP and IBP are suffering from Low Epsilon Overfitting (LEO), a problem arising from their training schedule that increases the input perturbation bound. We show that LEO can yield poor results even for a simple linear classifier. We also investigate the evidence of LEO from experiments under conditions of worsening LEO. Based on these observations, we propose a new training strategy, BatchMix, which mixes various input perturbation bounds in a mini-batch to alleviate the LEO problem. Experimental results on MNIST and CIFAR-10 datasets show that BatchMix can make the performance of IBP and CROWN-IBP better by mitigating LEO. |