UNIT: Backdoor Mitigation via Automated Neural Distribution Tightening
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Abstract (arXiv)
Deep neural networks (DNNs) have demonstrated effectiveness in various fields. However, DNNs are vulnerable to backdoor attacks, which inject a unique pattern, called trigger, into the input to cause misclassification to an attack-chosen target label. While existing works have proposed various methods to mitigate backdoor effects in poisoned models, they tend to be less effective against recent advanced attacks. In this paper, we introduce a novel post-training defense technique UNIT that can effectively eliminate backdoor effects for a variety of attacks. In specific, UNIT approximates a unique and tight activation distribution for each neuron in the model. It then proactively dispels substantially large activation values that exceed the approximated boundaries. Our experimental results demonstrate that UNIT outperforms 7 popular defense methods against 14 existing backdoor attacks, including 2 advanced attacks, using only 5% of clean training data. UNIT is also cost efficient. The code is accessible at https://github.com/Megum1/UNIT.
Key facts. Cited by 2 papers in the map (data through 7 Oct 2026). Builds on 57 of its 82 references that are in the map. First posted on arXiv 16 Jul 2024.
Builds on
57 of 82 references.
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38 more
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Citing papers per year: 2025: 1; 2026: 1.
2 papers.