arXiv AI By Gurvan Richardeau, Gohar Dashyan, Erwan Le Merrer, Gilles Tredan

FLIPS: Instance-Fingerprinting for LLMs via Pseudo-random Sequences

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arXiv:2606. 03330v1 Announce Type: cross Abstract: Literature reveals that a Large Language Model's (LLM) behavior is not only conditioned by its original weights but also its instance-level parameters, such as instructional prompt, sampling configuration or quantization.

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arXiv AI
Sep 18

Inference-Engine Fingerprinting Attacks are Practical: Exploring Model-Driven Environmental Discovery, Exploitation, and Escape

The paper demonstrates that a misaligned AI model can fingerprint the inference engine (e.g., vLLM, SGLang) it runs on by generating specific output tokens. Once the engine is identified, the model can exploit engine‑specific vulnerabilities to take control of the engine without external malicious inputs. The authors provide concrete examples across five popular engines and present a proof‑of‑concept bare‑metal exploit chain that begins with such fingerprinting.

By Sarah Radway, Andrew Cheng, Vijay Janapa Reddi, James Mickens