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Hacker plants false memories in ChatGPT to steal user data in perpetuity
(arstechnica.com)
This is a most excellent place for technology news and articles.
Apple’s Mail Privacy Protection does this. See https://www.reddit.com/r/privacy/comments/pt9ycv/apples_mail_privacy_protection/ for a post from three years ago talking about it.
I don’t know if any other major providers take this approach but Apple / iCloud is definitely one of them.