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Home / Proceedings / Proceedings of the AAAI Conference on Artificial Intelligence / EAAI-20

The Curse of Concentration in Robust Learning: Evasion and Poisoning Attacks from Concentration of Measure

February 1, 2023

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Authors

Saeed Mahloujifar

University of Virginia


Dimitrios I. Diochnos

University of Virginia


Mohammad Mahmoody

University of Virginia


DOI:

10.1609/aaai.v33i01.33014536


Abstract:

Many modern machine learning classifiers are shown to be vulnerable to adversarial perturbations of the instances. Despite a massive amount of work focusing on making classifiers robust, the task seems quite challenging. In this work, through a theoretical study, we investigate the adversarial risk and robustness of classifiers and draw a connection to the well-known phenomenon of “concentration of measure” in metric measure spaces. We show that if the metric probability space of the test instance is concentrated, any classifier with some initial constant error is inherently vulnerable to adversarial perturbations.One class of concentrated metric probability spaces are the so-called Lévy families that include many natural distributions. In this special case, our attacks only need to perturb the test instance by at most O(√n) to make it misclassified, where n is the data dimension. Using our general result about Lévy instance spaces, we first recover as special case some of the previously proved results about the existence of adversarial examples. However, many more Lévy families are known (e.g., product distribution under the Hamming distance) for which we immediately obtain new attacks that find adversarial examples of distance O(√n).Finally, we show that concentration of measure for product spaces implies the existence of forms of “poisoning” attacks in which the adversary tampers with the training data with the goal of degrading the classifier. In particular, we show that for any learning algorithm that uses m training examples, there is an adversary who can increase the probability of any “bad property” (e.g., failing on a particular test instance) that initially happens with non-negligible probability to ≈ 1 by substituting only Õe(√m) of the examples with other (still correctly labeled) examples.

Topics: AAAI

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HOW TO CITE:

Saeed Mahloujifar||Dimitrios I. Diochnos||Mohammad Mahmoody The Curse of Concentration in Robust Learning: Evasion and Poisoning Attacks from Concentration of Measure Proceedings of the AAAI Conference on Artificial Intelligence (2019) 4536-4543.

Saeed Mahloujifar||Dimitrios I. Diochnos||Mohammad Mahmoody The Curse of Concentration in Robust Learning: Evasion and Poisoning Attacks from Concentration of Measure AAAI 2019, 4536-4543.

Saeed Mahloujifar||Dimitrios I. Diochnos||Mohammad Mahmoody (2019). The Curse of Concentration in Robust Learning: Evasion and Poisoning Attacks from Concentration of Measure. Proceedings of the AAAI Conference on Artificial Intelligence, 4536-4543.

Saeed Mahloujifar||Dimitrios I. Diochnos||Mohammad Mahmoody. The Curse of Concentration in Robust Learning: Evasion and Poisoning Attacks from Concentration of Measure. Proceedings of the AAAI Conference on Artificial Intelligence 2019 p.4536-4543.

Saeed Mahloujifar||Dimitrios I. Diochnos||Mohammad Mahmoody. 2019. The Curse of Concentration in Robust Learning: Evasion and Poisoning Attacks from Concentration of Measure. "Proceedings of the AAAI Conference on Artificial Intelligence". 4536-4543.

Saeed Mahloujifar||Dimitrios I. Diochnos||Mohammad Mahmoody. (2019) "The Curse of Concentration in Robust Learning: Evasion and Poisoning Attacks from Concentration of Measure", Proceedings of the AAAI Conference on Artificial Intelligence, p.4536-4543

Saeed Mahloujifar||Dimitrios I. Diochnos||Mohammad Mahmoody, "The Curse of Concentration in Robust Learning: Evasion and Poisoning Attacks from Concentration of Measure", AAAI, p.4536-4543, 2019.

Saeed Mahloujifar||Dimitrios I. Diochnos||Mohammad Mahmoody. "The Curse of Concentration in Robust Learning: Evasion and Poisoning Attacks from Concentration of Measure". Proceedings of the AAAI Conference on Artificial Intelligence, 2019, p.4536-4543.

Saeed Mahloujifar||Dimitrios I. Diochnos||Mohammad Mahmoody. "The Curse of Concentration in Robust Learning: Evasion and Poisoning Attacks from Concentration of Measure". Proceedings of the AAAI Conference on Artificial Intelligence, (2019): 4536-4543.

Saeed Mahloujifar||Dimitrios I. Diochnos||Mohammad Mahmoody. The Curse of Concentration in Robust Learning: Evasion and Poisoning Attacks from Concentration of Measure. AAAI[Internet]. 2019[cited 2023]; 4536-4543.


ISSN: 2374-3468


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