At 07:05 PM 02/05/2000 +0000, you wrote:
There is one big difference. Runoff, *roff, TeX, etc
are all
human-readable anyway. Yes, I know TeX is a complete programming
language, so in theory you could encrypt some text and write a TeX document
that decodes it and prints it, but nobody ever does :-).
Tony: did you ever play with BASiX ? it was a bare-bones TeX-based BASIC
intepreter written just for the sake of proving that it could be done.
It was published in TUGBoat at some point in time. Fun source to look at.