MECP-GAP: Mobility-Aware MEC Planning via GNNs
A Watchdog Model for Backdoored LoRA Adapters
Overview
Most simple backdoor checks look for a specific trigger phrase. That breaks the moment the trigger is unknown or paraphrased. This project asks a different question: can a small “watchdog” model learn to recognize a backdoor from how a suspect model behaves, rather than from what exact words it responds to?
Method
The project has two phases. First, acting as the attacker, a base model is fine-tuned with both backdoored and clean LoRA adapters to build a labeled set of examples. Second, acting as the defender, a small distilled model is trained on statistical signals extracted from those adapters — how confident the suspect model is about its own outputs, and how semantically consistent its response is with the prompt. A multi-head architecture lets the watchdog separately flag suspicious input tokens, suspicious output tokens, and issue an overall verdict.
Results
The pipeline produces a working end-to-end classifier: given a new LoRA adapter, it outputs a CLEAN, SUSPICIOUS, or BACKDOOR DETECTED verdict without needing to know the trigger or target in advance. The main takeaway is that confidence and semantic-consistency signals carry real information about backdoor behavior even when the exact trigger text is never given to the detector.
2026
2025
A Watchdog Model for Backdoored LoRA Adapters
Overview Most simple backdoor checks look for a specific trigger phrase. That breaks the moment the trigger is unknown or paraphrased. This project asks a di...
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Turning a Backdoor’s Step Function Into a Ramp
Overview A backdoor behaves like a step function: invisible until its trigger fires, fully present the instant it does. That makes it a bad target for anythi...
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Starting Point: Vision-Language Models for Dental X-rays
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Overview Most backdoor-detection papers evaluate on large models behind a GPU cluster, which makes it hard to build intuition about when a detection signal a...
Understanding BackdoorBench: A Comprehensive Benchmark for AI Security
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2024
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2023
Project Iridium
Project Iridium
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2021
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2020
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