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Private LLM copies agree on secret key via public channel

Researchers have demonstrated that separate, private copies of large language models (LLMs) can collaboratively establish a shared secret key using only a public communication channel. This method leverages steganography, where information is hidden within seemingly innocuous data transmissions. The technique allows for secure key agreement even when the LLM instances cannot directly communicate, potentially opening new avenues for private communication protocols. AI

IMPACT Demonstrates a novel method for secure communication between isolated LLM instances, potentially impacting private AI interactions.

RANK_REASON Academic paper detailing a novel method for LLM communication. [lever_c_demoted from research: ic=1 ai=1.0]

Read on LessWrong (AI tag) →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Private LLM copies agree on secret key via public channel

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39 / 100
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Academic paper detailing a novel method for LLM communication. [lever_c_demoted from research: ic=1 ai=1.0]
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COVERAGE [1]

  1. LessWrong (AI tag) TIER_1 English(EN) · matthew-ritch ·

    Private LLM copies can agree on a secret key over a public channel

    <p><em>Cross-posted from <a href="https://matthewritch.com/blog/2026/11/08/LLM-Preferences-Private-Keys-Fingerprinting/">my blog</a></em>.</p> <p><em>Epistemic status exploratory, no running protocol, theoretical estimates from a single experiment and 4 closed-weights models</em>…