[Arkcon]

Consider adding an expensive intelligence project that allows a race to intercept and receive the communication between two races.

That might seem unbalanceing on the face of it-- so you might have the result just be a fragment of the message, 30 % of the text, or every 4 th word or something. Perhaps a delay between interception and display, to allow for encryption time. This would be pointless against the AI, but it would be interesting in human games.

This sort of thing has happened in the historical wars here on Earth, so it might add interesting dimension to SE4 warfare -- giving away fleet movements, attack plans, etc.