A constant-time implementation methodology for activation functions on ARM Cortex-M4 microcontrollers using branchless selection, Padé approximations, dummy arithmetic, and cycle alignment to eliminate timing side channels while preserving accuracy.
{CSI}{NN}: Reverse engineering of neural network architectures through electromagnetic side channel,
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A Constant-Time Implementation Methodology for Activation Functions on Microcontrollers
A constant-time implementation methodology for activation functions on ARM Cortex-M4 microcontrollers using branchless selection, Padé approximations, dummy arithmetic, and cycle alignment to eliminate timing side channels while preserving accuracy.