Topological Detection of Trojaned Neural Networks

• URL: http://arxiv.org/abs/2106.06469v1
• Date: Fri, 11 Jun 2021 15:48:16 GMT
• Title: Topological Detection of Trojaned Neural Networks
• Authors: Songzhu Zheng, Yikai Zhang, Hubert Wagner, Mayank Goswami, Chao Chen
• Abstract summary: Trojan attacks occur when attackers stealthily manipulate the model's behavior. We find subtle structural deviation characterizing Trojaned models. We devise a strategy for robust detection of Trojaned models.
• Score: 10.559903139528252
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Deep neural networks are known to have security issues. One particular threat is the Trojan attack. It occurs when the attackers stealthily manipulate the model's behavior through Trojaned training samples, which can later be exploited. Guided by basic neuroscientific principles we discover subtle -- yet critical -- structural deviation characterizing Trojaned models. In our analysis we use topological tools. They allow us to model high-order dependencies in the networks, robustly compare different networks, and localize structural abnormalities. One interesting observation is that Trojaned models develop short-cuts from input to output layers. Inspired by these observations, we devise a strategy for robust detection of Trojaned models. Compared to standard baselines it displays better performance on multiple benchmarks.

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