Exactly; Apple has always controlled what can be sent to the DAC on the audio jack. (I don't know if it has a dedicated DAC, but even if it shares with the spea

Exactly; Apple has always controlled what can be sent to the DAC on the audio jack. (I don't know if it has a dedicated DAC, but even if it shares with the speaker, the device knows when something is plugged into the jack). How secure are these dongles? Will we see third party ones, or do you need key material from Apple before they will light up? The Xbox is full of this kind of thing, btw (most peripherals require a "security chip" that just needs to handshake; purely revenue protection, and nothing to do with security).