Efficient Defense Against Model Stealing Attacks on Convolutional Neural Networks

• URL: http://arxiv.org/abs/2309.01838v2
• Date: Mon, 11 Sep 2023 14:09:53 GMT
• Title: Efficient Defense Against Model Stealing Attacks on Convolutional Neural Networks
• Authors: Kacem Khaled, Mouna Dhaouadi, Felipe Gohring de Magalh\~aes and Gabriela Nicolescu
• Abstract summary: Model stealing attacks can lead to intellectual property theft and other security and privacy risks. Current state-of-the-art defenses against model stealing attacks suggest adding perturbations to the prediction probabilities. We propose a simple yet effective and efficient defense alternative.
• Score: 0.548924822963045
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Model stealing attacks have become a serious concern for deep learning models, where an attacker can steal a trained model by querying its black-box API. This can lead to intellectual property theft and other security and privacy risks. The current state-of-the-art defenses against model stealing attacks suggest adding perturbations to the prediction probabilities. However, they suffer from heavy computations and make impracticable assumptions about the adversary. They often require the training of auxiliary models. This can be time-consuming and resource-intensive which hinders the deployment of these defenses in real-world applications. In this paper, we propose a simple yet effective and efficient defense alternative. We introduce a heuristic approach to perturb the output probabilities. The proposed defense can be easily integrated into models without additional training. We show that our defense is effective in defending against three state-of-the-art stealing attacks. We evaluate our approach on large and quantized (i.e., compressed) Convolutional Neural Networks (CNNs) trained on several vision datasets. Our technique outperforms the state-of-the-art defenses with a $\times37$ faster inference latency without requiring any additional model and with a low impact on the model's performance. We validate that our defense is also effective for quantized CNNs targeting edge devices.

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