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[tech] Zero-width characters and tracking via pasted text

Sean Conner sean at conman.org

Sun Mar 14 23:11:02 GMT 2021

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It was thus said that the Great Stephane Bortzmeyer once stated:

On Sun, Mar 14, 2021 at 04:12:12PM +0000,
nervuri <nervuri at disroot.org> wrote
a message of 34 lines which said:
This subtle form of tracking would work just as well on Gemini as it
does on the web.
This is technically interesting but do you suggest that Gemini be
modified in one way or the other, to limit the risks? And, if so, how?
As you note in <gemini://rawtext.club/~nervuri/stega.gmi>, it can
perfectly be done without zero-width characters. A trivial way is to
encode the hidden information in a number of ordinary spaces at the
end of each line.

Or by word choice, or word order, or homographs [1]. There are many waysto do this.

-spc

[1] https://en.wikipedia.org/wiki/IDN_homograph_attack