SLAP: Improving Physical Adversarial Examples with Short-Lived Adversarial Perturbations

• URL: http://arxiv.org/abs/2007.04137v3
• Date: Wed, 6 Jan 2021 16:17:39 GMT
• Title: SLAP: Improving Physical Adversarial Examples with Short-Lived Adversarial Perturbations
• Authors: Giulio Lovisotto, Henry Turner, Ivo Sluganovic, Martin Strohmeier, Ivan Martinovic
• Abstract summary: Short-Lived Adrial Perturbations (SLAP) is a novel technique that allows adversaries to realize physically robust real-world AE by using a light projector. SLAP allows the adversary greater control over the attack compared to adversarial patches. We study the feasibility of SLAP in the self-driving scenario, targeting both object detector and traffic sign recognition tasks.
• Score: 19.14079118174123
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Research into adversarial examples (AE) has developed rapidly, yet static adversarial patches are still the main technique for conducting attacks in the real world, despite being obvious, semi-permanent and unmodifiable once deployed. In this paper, we propose Short-Lived Adversarial Perturbations (SLAP), a novel technique that allows adversaries to realize physically robust real-world AE by using a light projector. Attackers can project a specifically crafted adversarial perturbation onto a real-world object, transforming it into an AE. This allows the adversary greater control over the attack compared to adversarial patches: (i) projections can be dynamically turned on and off or modified at will, (ii) projections do not suffer from the locality constraint imposed by patches, making them harder to detect. We study the feasibility of SLAP in the self-driving scenario, targeting both object detector and traffic sign recognition tasks, focusing on the detection of stop signs. We conduct experiments in a variety of ambient light conditions, including outdoors, showing how in non-bright settings the proposed method generates AE that are extremely robust, causing misclassifications on state-of-the-art networks with up to 99% success rate for a variety of angles and distances. We also demostrate that SLAP-generated AE do not present detectable behaviours seen in adversarial patches and therefore bypass SentiNet, a physical AE detection method. We evaluate other defences including an adaptive defender using adversarial learning which is able to thwart the attack effectiveness up to 80% even in favourable attacker conditions.

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