Search Results for author: Yan Scholten

Found 5 papers, 2 papers with code

Hierarchical Randomized Smoothing

no code implementations NeurIPS 2023 Yan Scholten, Jan Schuchardt, Aleksandar Bojchevski, Stephan Günnemann

Randomized smoothing is a powerful framework for making models provably robust against small changes to their inputs - by guaranteeing robustness of the majority vote when randomly adding noise before classification.

Node Classification

Assessing Robustness via Score-Based Adversarial Image Generation

no code implementations6 Oct 2023 Marcel Kollovieh, Lukas Gosch, Yan Scholten, Marten Lienen, Stephan Günnemann

In this work, we introduce Score-Based Adversarial Generation (ScoreAG), a novel framework that leverages the advancements in score-based generative models to generate adversarial examples beyond $\ell_p$-norm constraints, so-called unrestricted adversarial examples, overcoming their limitations.

Image Generation

Expressivity of Graph Neural Networks Through the Lens of Adversarial Robustness

1 code implementation16 Aug 2023 Francesco Campi, Lukas Gosch, Tom Wollschläger, Yan Scholten, Stephan Günnemann

We perform the first adversarial robustness study into Graph Neural Networks (GNNs) that are provably more powerful than traditional Message Passing Neural Networks (MPNNs).

Adversarial Robustness Subgraph Counting

Randomized Message-Interception Smoothing: Gray-box Certificates for Graph Neural Networks

1 code implementation5 Jan 2023 Yan Scholten, Jan Schuchardt, Simon Geisler, Aleksandar Bojchevski, Stephan Günnemann

To remedy this, we propose novel gray-box certificates that exploit the message-passing principle of GNNs: We randomly intercept messages and carefully analyze the probability that messages from adversarially controlled nodes reach their target nodes.

Adversarial Robustness

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