Friday, April 22, 2016 [Tweets] [Favorites]

How iMessage Distributes Security to Block “Phantom Devices”

Rich Mogull:

It turns out you can’t add devices to an iCloud account without triggering an alert because that analysis happens on your device, and doesn’t rely (totally) on a push notification from the server. Apple put the security logic in each device, even though the system still needs a central authority. Basically, they designed the system to not trust them.

[…]

Once in place that will make it impossible to place a ‘tap’ using a phantom device without at least someone in the conversation receiving an alert. The way the current system works, you also cannot add a phantom recipient because your own devices keep checking for new recipients on your account.

I hope he can get Apple to talk about iMessage backups.

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