OT - information theory thing...

[Modulok]

I'm trying to remember something I read one night to do with information
theory to vague for Google to help much. If anyone could help me remember
that would be wonderful!

It had something to do with the fact that, given a transmission medium, you
can control whether information flows or not, but it is impossible to
control *what* information flows. (Due to the possibility of nested
encoding, stenography, etc.) Was this a Claude Shannon thing or Alan Turing
or... I really don't recall. Thoughts?

Cheers!
-Modulok-
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