Fault Injection and Safe-Error Attack for Extraction of Embedded Neural Network Models

• URL: http://arxiv.org/abs/2308.16703v1
• Date: Thu, 31 Aug 2023 13:09:33 GMT
• Title: Fault Injection and Safe-Error Attack for Extraction of Embedded Neural Network Models
• Authors: Kevin Hector, Pierre-Alain Moellic, Mathieu Dumont, Jean-Max Dutertre
• Abstract summary: We focus on embedded deep neural network models on 32-bit microcontrollers in the Internet of Things (IoT) We propose a black-box approach to craft a successful attack set. For a classical convolutional neural network, we successfully recover at least 90% of the most significant bits with about 1500 crafted inputs.
• Score: 1.3654846342364308
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Model extraction emerges as a critical security threat with attack vectors exploiting both algorithmic and implementation-based approaches. The main goal of an attacker is to steal as much information as possible about a protected victim model, so that he can mimic it with a substitute model, even with a limited access to similar training data. Recently, physical attacks such as fault injection have shown worrying efficiency against the integrity and confidentiality of embedded models. We focus on embedded deep neural network models on 32-bit microcontrollers, a widespread family of hardware platforms in IoT, and the use of a standard fault injection strategy - Safe Error Attack (SEA) - to perform a model extraction attack with an adversary having a limited access to training data. Since the attack strongly depends on the input queries, we propose a black-box approach to craft a successful attack set. For a classical convolutional neural network, we successfully recover at least 90% of the most significant bits with about 1500 crafted inputs. These information enable to efficiently train a substitute model, with only 8% of the training dataset, that reaches high fidelity and near identical accuracy level than the victim model.

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