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PhysGAN: Generating Physical-World-Resilient Adversarial Examples for Autonomous Driving

Although Deep neural networks (DNNs) are being pervasively used in vision-based autonomous driving systems, they are found vulnerable to adversarial attacks where small-magnitude perturbations into the inputs during test time cause dramatic changes to the outputs. While most of the recent attack methods target at digital-world adversarial scenarios, it is unclear how they perform in the physical world, and more importantly, the generated perturbations under such methods would cover a whole driving scene including those fixed background imagery such as the sky, making them inapplicable to physical world implementation. We present PhysGAN, which generates physical-world-resilient adversarial examples for mislead-ing autonomous driving systems in a continuous manner. We show the effectiveness and robustness of PhysGAN via extensive digital and real-world evaluations. Digital experiments show that PhysGAN is effective for various steer-ing models and scenes, which misleads the average steer-ing angle by up to 23.06 degrees under various scenarios. The real-world studies further demonstrate that PhysGAN is sufficiently resilient in practice, which misleads the average steering angle by up to 19.17 degrees. We compare PhysGAN with a set of state-of-the-art baseline methods including several of our self-designed ones, which further demonstrate the robustness and efficacy of our approach. We also show that PhysGAN outperforms state-of-the-art baseline methods To the best of our knowledge, PhysGANis probably the first technique of generating realistic and physical-world-resilient adversarial examples for attacking common autonomous driving scenarios.

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