arXiv AI

Large-scale Testing Global Optimization Methods with Black-box Adversarial Attacks

arXiv:2608. 13296v1 Announce Type: cross Abstract: Existing global optimization benchmark suites are of a moderate size and are based on a small number of analytical functions that date back even to the 1970s.

arXiv Machine Learning
Sep 17

Consensus-based optimization for closed-box adversarial attacks and a connection to evolution strategies

The paper investigates Consensus-based Optimization (CBO) as a gradient‑free method for closed‑box adversarial attacks, where imperceptible perturbations fool a classifier without gradient access. It establishes a theoretical link between CBO’s consensus hopping and natural evolution strategies (NES), and relates both to gradient‑based optimization. Experiments demonstrate that CBO can outperform NES and other evolutionary strategies in some scenarios.

By Tim Roith, Leon Bungert, Philipp Wacker
arXiv Machine Learning
5d ago

Frame the adversary: a structure-aware attack methodology

The paper introduces a new framework for creating frequency‑based adversarial attacks that are grounded in an explicit optimization problem. By defining a perturbation constraint set linked to structured, non‑orthogonal transforms, the authors show that attacks can be generated as weighted σ‒projections onto this set, providing a clear geometric characterization. Experiments on standard datasets demonstrate that these attacks are highly effective across both pretrained and robust models, even on unseen architectures.

By Vicky Kouni, Stelios Perrakis, Francis Bach, Pascal Frossard, Yann Chevaleyre