Exploring the vulnerabilities and enhancing the adversarial robustness of deep neural networks

• Main Author: Bai, Tao
• Other Authors: Jun Zhao
• Format: Thesis-Doctor of Philosophy
• Language: English
• Published: Nanyang Technological University 2022
• Subjects: Engineering::Computer science and engineering::Computing methodologies::Artificial intelligence; Engineering::Computer science and engineering::Computing methodologies::Image processing and computer vision
• Online Access: https://hdl.handle.net/10356/160963
• Institution: Nanyang Technological University

Deep learning, especially deep neural networks (DNNs), is at the heart of the current rise of artificial intelligence, and the major breakthroughs in the last few years have been made by DNNs. It has been demonstrated in recent works that DNNs are vulnerable to human-crafted adversarial examples, which look normal in human eyes. Such adversarial instances can fool and mislead DNNs to misbehave as adversaries expected, causing serious consequences for various DNN-based applications in our daily life. To this end, this thesis dedicates to revealing the vulnerabilities of deep learning algorithms and developing defense strategies for combating adversaries effectively. We study current DNNs from the perspective of security with two sides: attack and defense. On the attack front, we explore the possibility of attacks against DNNs during test time with two types of adversarial examples: adversarial perturbations and adversarial patches. On the defense front, we develop solutions to defend against adversarial examples and investigate the robustness-preserving distillation techniques.