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Re: Can watermarking Unicode text using invisible differences sneak thro

From: Richard Stallman
Subject: Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?
Date: Wed, 09 Feb 2022 22:57:51 -0500

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  > > How do you represent an uncombined zigzag-above in Unicode?
  > > Put it after SPACE as a combination?

  > If I understand correctly what you want, you should use U+25CC DOTTED
  > CIRCLE before the combining character, not SPACE.

Maybe that is right, but I don't understand it.
Why is that right?

Anyway, if DOTTED CIRCLE + COMBINING ZIGZAG ABOVE is the right way
to represent a noncombiing ZIGZAG ABOVE, Emacs can use that.

  > > It wouldn't be very hard to add a list of extra decompositions that
  > > are not known to Unicode itself.

  > Sure, but that means we'd need some manually-maintained database
  > anyway.

Maybe so.  But these automatic methds will make a good simplification
even if it doesn't simplify everything perfectly.

Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)

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