AI Weekly Malaysia

Researchers demonstrated that encrypted chain-of-thought blocks returned by OpenAI, Anthropic, and Google APIs are portable across sessions, users, and models. By replaying a stronger model's encrypted trace into a weaker, jailbroken sibling from the same provider, they extracted the stronger model's hidden reasoning in plaintext without directly attacking the stronger model or triggering anti-distillation safeguards.

Why: If you pass encrypted thinking blocks between models or sessions in your agent pipeline, you may be leaking proprietary reasoning traces that can be recovered by anyone with API access to a jailbroken sibling model. Audit how you store and forward these encrypted blocks, especially if you cache or log assistant responses containing 'thinking' signatures.