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On Evaluating the Durability of Safeguards for Open-Weight LLMs

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arxiv 2412.07097 v1 pith:QJ5G6AOY submitted 2024-12-10 cs.CR cs.AI

classification cs.CRcs.AI
keywords llmsmodelmodelssafeguardsevenweightsadversariesdurable
verification ladder T0 review T1 audit T2 compute T3 formal
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Stakeholders -- from model developers to policymakers -- seek to minimize the dual-use risks of large language models (LLMs). An open challenge to this goal is whether technical safeguards can impede the misuse of LLMs, even when models are customizable via fine-tuning or when model weights are fully open. In response, several recent studies have proposed methods to produce durable LLM safeguards for open-weight LLMs that can withstand adversarial modifications of the model's weights via fine-tuning. This holds the promise of raising adversaries' costs even under strong threat models where adversaries can directly fine-tune model weights. However, in this paper, we urge for more careful characterization of the limits of these approaches. Through several case studies, we demonstrate that even evaluating these defenses is exceedingly difficult and can easily mislead audiences into thinking that safeguards are more durable than they really are. We draw lessons from the evaluation pitfalls that we identify and suggest future research carefully cabin claims to more constrained, well-defined, and rigorously examined threat models, which can provide more useful and candid assessments to stakeholders.

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Cited by 6 Pith papers

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