[lern_too_spel]

> and only if you accept them

Does iMessage give the user any way to reject them? Show me. Apple's own "Apple Platform Security Spring 2020" document does not claim any such thing. It says the device requests keys from IDS at the start of a conversation and just uses them.

The article I linked to above said that Apple fixed several other bugs the researchers pointed out but not that one, which other researchers had also described to Apple years before.