I've been thinking a lot about this for <a href="https://www.diffdiff.net" rel="nofollow">https://www.diffdiff.net</a>. After convenience, privacy is the core of the value proposition - the text to diff doesn't get sent to the server.<p>On the other hand, though, if you want to publish/share a diff, then, you know, <i>privacy is the core of the value proposition</i>, so you probably don't want to share it with the whole world, much less let the whole world edit or delete it!<p>It's possible to design a scheme with hard-to-guess URLs, URL parameters with "secret edit tokens" and so on, but that feels hard to use and different from how other sites work.<p>I'm quite torn.