We are thrilled to announce that our conference paper entitled “Trapped by Their Own Light: Deployable and Stealth Retroreflective Patch Attacks on Traffic Sign Recognition Systems” has been accepted for publication in The 42nd Annual Computer Security Applications Conference (ACSAC 2026). This work is a fruit of our collaboration with Keio University and the University of California, Irvine. Congratulations to Tsuruoka-kun and kudos to the entire team!

In this work, we propose the Adversarial Retroreflective Patch (ARP), a novel attack vector against Traffic Sign Recognition (TSR) systems that combines the high deployability of physical patches with the stealth of light-based attacks. ARP leverages retroreflective materials that remain inconspicuous under ambient light and are activated only by the victim vehicle’s own headlights. Through physics-based retroreflection modeling and black-box attack optimization, ARP achieves over a 90% attack success rate in dynamic driving scenarios and 60% against commercial TSR systems, while a human user study confirms stealthiness comparable to benign signs. We also design DPR Shield, a defense built from two strategically placed polarized filters, which achieves ≥75% defense success rates for stop signs and speed limit signs.

Go Tsuruoka, Takami Sato, Qi Alfred Chen, Kazuki Nomoto, Ryunosuke Kobayashi, Yuna Tanaka, and Tatsuya Mori, "Trapped by Their Own Light: Deployable and Stealth Retroreflective Patch Attacks on Traffic Sign Recognition Systems." In Proc. of The 42nd Annual Computer Security Applications Conference (ACSAC 2026), Los Angeles, CA, USA, Dec 2026. (Acceptance rate=98/507=19.3%)

We have set up two new pages that track the research literature our group follows closely. Both lists are harvested from arXiv and refreshed automatically every week.

Adversarial Example Papers (Carlini list continuation): a continuation of Nicholas Carlini’s well-known “(A Complete) List of All Adversarial Example Papers”, which stopped updating in September 2025. Our replication covers arXiv submissions since then, selected by a classifier trained on the original 13,697-entry list.

Physical AI Security Papers: a curated list of arXiv papers on the security (attacks and defenses) of AI-driven cyber-physical systems: autonomous driving, drones/UAV, robotics, and embodied AI. The list goes back to 2013 and is categorized by target platform.

Both pages are linked from the Projects menu. Comments and pointers to papers we may have missed are welcome.

We are thrilled to announce that our conference paper entitled “Artistic Adversarial Examples: Graffiti-Based Adversarial Attacks on Traffic Sign Recognition” has been accepted for publication in The 28th International Conference on Information and Communications Security (ICICS 2026). This work is a fruit of our international collaboration with Politecnico di Milano. Congratulations to Zhuge-kun and kudos to the entire team!

In this work, we propose artistic adversarial examples — adversarial patches crafted to look like ordinary street graffiti so that they blend naturally into urban scenes. Combining a graffiti-trained generative model with a two-stage optimization that couples white-box latent optimization and black-box placement refinement, our attack degrades traffic sign detection while keeping the perturbations visually plausible. Extensive experiments across digital, simulated, and physical settings show that the generated graffiti substantially disrupts traffic sign recognition, achieving up to a 72.8% attack success rate with an average confidence drop of 65.8%.

Zhenghao Michele Zhuge, Go Tsuruoka, Zhihe Zhang, Stefano Longari, Lachlan Moore, Stefano Zanero, and Tatsuya Mori, "Artistic Adversarial Examples: Graffiti-Based Adversarial Attacks on Traffic Sign Recognition." In Proc. of The 28th International Conference on Information and Communications Security (ICICS 2026), Fukui, Japan, Oct 2026.