Research Reveals Vulnerability in Encrypted Chain-of-Thought of Major LLMs

A recent study exposed an API design vulnerability in major LLMs from OpenAI, Anthropic, and Google, where encrypted chain-of-thought blocks are fully compatible across different sessions, users, and models, allowing attackers to easily steal the models' reasoning processes.

2026-08-11 ~ 2026-08-11 · 2 related posts

• Paper Reveals Encrypted CoT Flaw Allowing Reasoning Theft from Top LLMs — Alexander Panfilov · 2026-08-11
• Researchers Expose API Flaw: Encrypted Chain-of-Thought in Major LLMs Can Be Stolen — dpaleka · 2026-08-11