Be careful what you copy: Invisibly inserting usernames into text
I did this (non-publicly) many years ago for my eve online alliance. A substantial problem exists in that forging the identity of _someone else_ is fairly easy in a naive scheme if someone detects these characters. That means you can sow chaos by blaming innocent folks. In practice you'll want to "sign" the inserted data as well.<p>Also because of the overhead here and the fact that you will want the signature to occur at regular intervals a better compression scheme than 0=>char1 1=>char2 is needed. Combining zero width chars and homoglyph substitution* can produce codings which hold signed usernames in only a few characters.<p>There are other, far more interesting ways, to watermark text than this that are both harder (to impossible) to detect that produce better results.<p>*<a href="https://www.researchgate.net/publication/308044170_Content-preserving_Text_Watermarking_through_Unicode_Homoglyph_Substitution" rel="nofollow">https://www.researchgate.net/publication/308044170_Content-p...</a><p>P.S. It's nice to see people publish conference papers on this stuff. I always had to hide it because we actually used it.