This clever tool can help identify leakers who copy and paste your private or sensitive text. The tool relies on so-called "zero-width" characters, invisible characters hidden within words.https://motherboard.vice.com/en_us/article/wj7zpm/zero-width-characters-tool-to-identify-leakers-copy-and-paste-secret-info …
True, but if two collaborators sat next to each other and did see differences, I don't know if there's a way to produce a third provably untraceable text. That would be an interesting problem. You could write a vague summary, but is that as useful a leak? 
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With enough differences you could even use reed solomon encoding to ensure minor edits are tolerated and still identifiable!
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Even with a vague summary, unless it's very high-level, you can't be sure you weren't both in a group being used to bisect recipient groups to find the leakers. It's an interesting computer science problem for both parties.
End of conversation
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I guess depending on the algo used on the back-end, it could range from trivial to almost impossible. But I agree this topic is really interesting! Also, sorry for my rough english. :)
Thanks. Twitter will use this to make your timeline better. UndoUndo
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