Cited by 8Adversarial Robustness in Machine LearningDigital Media Forensic DetectionSecurity and Verification in Computing

Detecting Scene-Plausible Perceptible Backdoors in Trained DNNs Without Access to the Training Set

Xiang, Zhen, Miller, David J., Wang, Hang, Kesidis, George·2021·Neural Computation

Abstract

Backdoor data poisoning attacks add mislabeled examples to the training set, with an embedded backdoor pattern, so that the classifier learns to classify to a target class whenever the backdoor pattern is present in a test sample. Here, we address posttraining detection of scene-plausible perceptible backdoors, a type of backdoor attack that can be relatively easily fashioned, particularly against DNN image classifiers. A post-training defender does not have access to the potentially poisoned training set, only to the trained classifier, as well as some unpoisoned examples that need not be training samples. Without the poisoned training set, the only information about a backdoor pattern is encoded in the DNN's trained weights. This detection scenario is of great import considering legacy and proprietary systems, cell phone apps, as well as training outsourcing, where the user of the classifier will not have access to the entire training set. We identify two important properties of scene-plausible perceptible backdoor patterns, spatial invariance and robustness, based on which we propose a novel detector using the maximum achievable misclassification fraction (MAMF) statistic. We detect whether the trained DNN has been backdoor-attacked and infer the source and target classes. Our detector outperforms existing detectors and, coupled with an imperceptible backdoor detector, helps achieve posttraining detection of most evasive backdoors of interest.

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Crossref · 10.1162/neco_a_01376

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Authors
Xiang, Z., Miller, D. J., Wang, H., & Kesidis, G.
Affiliations
Pennsylvania State University (US)
Corresponding author
  • Xiang, Zhen
  • Miller, David J.
  • Wang, Hang
  • Kesidis, George
Venue
Neural Computation
Published
2021-04-13
Volume
33
Issue
5
Pages
1329-1371
ISSN
  • 0899-7667 (ISSN-L)
  • 1530-888X
OpenAlex
W3132644649
Cited by
8
References
43
Citations by year
2026: 1 · 2024: 3 · 2023: 1 · 2022: 2 · 2021: 1
FWCI
0.62
Type
journal article
Language
en
Open access
closed
Locations
  • Neural Computation (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Adversarial Robustness in Machine Learning
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Digital Media Forensic Detection
  • Physical Sciences › Computer Science › Artificial Intelligence › Security and Verification in Computing
Keywords
backdoor attacks, backdoor detection, data poisoning, spatial invariance, robustness

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