| Summary: | In this paper, we present a novel hardware trojan assisted side-channel attack to reverse engineer DNN architectures on edge FPGA accelerators. In particular, our attack targets the widely-used Versatile Tensor Accelerator (VTA). A hardware trojan is employed to track the memory transactions by monitoring the AXI interface signals of VTA’s submodules. The memory side-channel information is leaked through a UART port, which reveals the DNN architecture information. Our experiments demonstrate the effectiveness of the proposed attack and highlight the need for robust security measures to protect DNN intellectual property (IP) models that are deployed on edge FPGA platforms.
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