Premise

Explanation 1:

 The encoder is sending a secret message past a middle man to the decoder

 The message is embedded within LLM text

  We quantify how well we did on:

   Sneakiness i.e. can the middle man notice changes to the secret message

   Information Embedding Rate i.e. how much information can we place in each token

Explanation 2:

 We have person a, b, c

 Wlog, player a is sending a hidden message to player b through some cover medium

 Player c inspects the cover medium for any distortions to detect the existence of the hidden message

 In our context, the cover medium is LLM text.