Entity · paper

Stemma: Induced Decision Regions Reveal LLM Provenance

paperactiveprovisionalstemma-induced-decision-regions-reveal-llm-provenance-8c983b20·1 events·first seen 38h ago

Aliases: Stemma: Induced Decision Regions Reveal LLM Provenance

Co-occurring entities

More like this (12)

Stemma ProvenanceGuard: Source-Aware Factuality Verification for MCP-Based LLM Agents Show Me How You Reason and I'll Tell You Who You Are: Reasoning Graphs for Robust LLM Authorship Attribution LLM inference Understanding the Impact of Linguistic Realization Choices on LLM Stance with Causal Tracing ProvenanceGuard A Tree-of-Thoughts Inspired Hybrid Approach for Legal Case Judgement Summarization using LLMs Agentic Chain-of-Thought Steering for Efficient and Controllable LLM Reasoning Validity of LLMs as data annotators: AMALIA on authority Which Values Do LLMs Confuse? A Schwartz-Based Recognition Study Can We Break LLMs Out of Self-Loops? Fine-Grained Reasoning Control with Activation Steering LLM Detection as an Intervention: Downstream Impact under Strategic User Behavior

Recent events (1)

6arXiv · cs.CL·38h ago·source ↗

Stemma: Black-box LLM fingerprinting via induced decision regions achieves 0.967 AUC on provenance testing

Researchers introduce Stemma, a black-box LLM fingerprinting method that determines whether a suspect model belongs to the same lineage as a source model. The approach maps open-ended outputs into a finite decision space ('induced decision regions') to abstract away surface-form variation caused by fine-tuning or deployment, then measures inheritance of those regions as a provenance signal. Evaluated across 770 source-suspect pairs from 56 public checkpoints, Stemma achieves 0.967 AUC and 87.8% TPR at 1% FPR, substantially outperforming four baselines, with even stronger results on deployment-setting robustness tests. The method addresses a practical gap in model IP protection and lineage auditing as fine-tuned derivatives proliferate.

Evaluation and Benchmarking Open Weights Progress Stemma: Induced Decision Regions Reveal LLM Provenance Stemma +1 more