Agents can hide high-capacity messages without a pre-shared key

Codetta lets asymmetric language-model agents establish a secret key and communicate covertly while preserving the sender’s output distribution.

Top University
Qi Pang · Virginia Smith · Wenting Zheng

Carnegie Mellon University

Research Digest··2 min read
Pang, Smith and Zheng present a steganographic protocol for independently deployed agents that do not share the same model or an initial secret key.

The authors built Codetta around a shared public model that estimates the communication channel, a sampling procedure designed to preserve the sender’s normal output distribution, and an adaptive error-correcting code that compensates for decoding errors.

Why this paper

From Carnegie Mellon University

In one line

Codetta enables high-capacity, undetectable steganographic collusion between independently deployed LLM agents without a pre-shared key.

What we could check

  • ·No code link found
  • ·No weights link found
  • ·No dataset link found
  • ·No compute details found
  • ·No stated limitations found
  • ·No benchmark numbers found

Observed from the paper text and links we have. Absence here means we did not find it, not that it does not exist.

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