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hacnho/
keras-concatenate-axis-trigger-poc

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Keras Concatenate Axis Trigger MFV PoC

This repository contains a benign Huntr MFV proof of concept.

Files:

control_concatenate_axis.keras - control Keras Native artifact with Concatenate(axis=-1).
malicious_concatenate_axis.keras - malicious Keras Native artifact with Concatenate(axis=1).
reproduce.py - verifies the trigger-specific output flip and scanner output.

Run:

bash

python3 -m venv /tmp/mfv-keras-concat-axis
. /tmp/mfv-keras-concat-axis/bin/activate
pip install -r requirements.txt
python reproduce.py

Expected result:

Benign two-input sequences keep classes [0, 1, 0] in both artifacts.
The trigger puts 2.0 only in the left input's second timestep; it is class 0 in the control artifact and class 1 in the malicious artifact.
modelscan==0.8.8 reports No issues found!.