Hacker News new | ask | show | jobs
by aragonite 521 days ago
> Google used to watermark internal emails using non-visible Unicode. It would catch people copy-pasting things to the press.

How does that even work? I assume the unique identifiers are generated along the lines of https://zws.im but do they send a different version of the same email to each unique recipient? Or does the watermark get inserted by some email client when copying text?

1 comments

It was the former, a unique ID per recipient.