Search Results for author: Zayd Hammoudeh

Found 8 papers, 6 papers with code

Large Language Models Are Better Adversaries: Exploring Generative Clean-Label Backdoor Attacks Against Text Classifiers

no code implementations28 Oct 2023 Wencong You, Zayd Hammoudeh, Daniel Lowd

Backdoor attacks manipulate model predictions by inserting innocuous triggers into training and test data.

Provable Robustness Against a Union of $\ell_0$ Adversarial Attacks

2 code implementations22 Feb 2023 Zayd Hammoudeh, Daniel Lowd

Sparse or $\ell_0$ adversarial attacks arbitrarily perturb an unknown subset of the features.

Reducing Certified Regression to Certified Classification for General Poisoning Attacks

1 code implementation29 Aug 2022 Zayd Hammoudeh, Daniel Lowd

We also show that the assumptions made by existing state-of-the-art certified classifiers are often overly pessimistic.

Classification regression

Adapting and Evaluating Influence-Estimation Methods for Gradient-Boosted Decision Trees

1 code implementation30 Apr 2022 Jonathan Brophy, Zayd Hammoudeh, Daniel Lowd

In the pursuit of better understanding GBDT predictions and generally improving these models, we adapt recent and popular influence-estimation methods designed for deep learning models to GBDTs.

Decision Making

Identifying a Training-Set Attack's Target Using Renormalized Influence Estimation

1 code implementation25 Jan 2022 Zayd Hammoudeh, Daniel Lowd

This work proposes the task of target identification, which determines whether a specific test instance is the target of a training-set attack.

Learning from Positive and Unlabeled Data with Arbitrary Positive Shift

1 code implementation NeurIPS 2020 Zayd Hammoudeh, Daniel Lowd

A common simplifying assumption is that the positive data is representative of the target positive class.

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