Read Be careful what you copy: Invisibly inserting usernames into text with Zero-Width Characters by Tom Ross (Medium)
Zero-width characters are invisible, ‘non-printing’ characters that are not displayed by the majority of applications. F​or exam​ple, I’ve ins​erted 10 ze​ro-width spa​ces in​to thi​s sentence, c​an you tel​​l? (Hint: paste the sentence into Diff Checker to see the locations of the characters!). These characters can be used to ‘fingerprint’ text for certain users.

A cool little trick with text for embedded steganography, security, or other communication purposes. 

This could also be used for pseudo-private communication via Webmention even. Just hide your messages inside of public messages.

Aaron Parecki bookmark Be careful what you copy: Invisibly inserting usernames into text with Zero-Width Characters (medium.com) ()

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Chris Aldrich

I'm a biomedical and electrical engineer with interests in information theory, complexity, evolution, genetics, signal processing, theoretical mathematics, and big history. I'm also a talent manager-producer-publisher in the entertainment industry with expertise in representation, distribution, finance, production, content delivery, and new media.

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