Stealing Reasoning Traces from Proprietary LLM APIs

Encrypted chain-of-thought blocks returned by Anthropic, OpenAI and Google APIs are interchangeable across sessions, users and models. We exploit this to decode hidden reasoning at scale.
688 points by quantumgarbage 71 days ago stolen-thoughts.com 302 comments

Summary

Researchers have discovered that encrypted reasoning outputs from major AI APIs can be decoded across different sessions and users. This method reveals insights into the decision-making processes of proprietary language models, raising important questions about transparency and security.

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