Researcher says they were behind iPhone popups at Def Con

Several attendees at the hacking conference Def Con reported seeing mysterious and persistent pop ups prompting them to use their Apple ID to connect to an Apple TV, or to share a password with an Apple TV nearby, according to attendee tweets over the weekend and people who spoke to TechCrunch.
These incidents confused and dumbfounded some of the attendees, who weren’t sure how these alerts — for lack of a better word — were carried out, nor what the goal was. Hacker shenanigans during Def Con are a decades-long tradition, and are more often pranks than actual malicious attacks.
In this case,

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