ONNX-Stego is a Python proof-of-concept for hiding short authenticated messages inside float32 ONNX model weights. It embeds bits in the least significant mantissa bit of selected weights, while using modern authenticated encryption for the hidden payload.
python cryptography opensource steganography infosec lsb-steganography neuralnetworks redteam onnx float32 datahiding mlsecurity defensivesecurity modelsecurity modelweights aiwatermarking covertchannel
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Updated
Jun 24, 2026 - Python