Infrared imaging systems have a vast array of potential applications in
pedestrian detection and autonomous driving, and their safety performance is of
great concern. However, few studies have explored the safety of infrared
imaging systems in real-world settings. Previous research has used physical
perturbations such as small bulbs and thermal "QR codes" to attack infrared
imaging detectors, but such methods are highly visible and lack stealthiness.
Other researchers have used hot and cold blocks to deceive infrared imaging
detectors, but this method is limited in its ability to execute attacks from
various angles. To address these shortcomings, we propose a novel physical
attack called adversarial infrared blocks (AdvIB). By optimizing the physical
parameters of the adversarial infrared blocks, this method can execute a
stealthy black-box attack on thermal imaging system from various angles. We
evaluate the proposed method based on its effectiveness, stealthiness, and
robustness. Our physical tests show that the proposed method achieves a success
rate of over 80% under most distance and angle conditions, validating its
effectiveness. For stealthiness, our method involves attaching the adversarial
infrared block to the inside of clothing, enhancing its stealthiness.
Additionally, we test the proposed method on advanced detectors, and
experimental results demonstrate an average attack success rate of 51.2%,
proving its robustness. Overall, our proposed AdvIB method offers a promising
avenue for conducting stealthy, effective and robust black-box attacks on
thermal imaging system, with potential implications for real-world safety and
security applications.

本研究提出了一种基于对抗性红外块的物理攻击方法，该方法可以从不同的角度对热成像系统进行黑盒攻击，成功率高达 80％以上，并以衣服内部的方式增强其潜行性。同时，本研究对先进探测器进行了测试，并证明了该方法的鲁棒性和实用性。