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See other comment: https://news.ycombinator.com/item?id=11116439

Potentially, Apple cannot circumvent their own protections on some models (in software anyway), and could in others.

Thanks. This explains it. I was just thinking about my old Thinkpad X41. That had TPM module and hardware encryption. There's nothing that IBM or the TPM manufacturer could've done to decrypt it (unless the TPM module already had backdoors, haha). Latest iPhones are basically the same?

I don't get it. How would they be load the backdoor is the phone is still locked?

iTunes recovery mode? It allows to restore the OS, but also gives you other means to manipulate the device. Imagine if they simply hot-patch the lockscreen to allow any number of tries of password?

Recovery mode with DFU and the like results in a device wipe.

There are many ways to redo the firmware, but every single one of them, by design, requires wiping the phone to implement.

The outcome of entering DFU mode for most of us is a device wipe but this doesn't have to be the case for Apple.

[0] https://news.ycombinator.com/item?id=11115945

You can reinstall a phone from recovery mode without erasing it.

https://support.apple.com/en-us/HT201263

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