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Wednesday, February 17, 2016

Summary of some of the technical points that Apple's letter/most articles didn't get into

http://www.zdziarski.com/blog/?p=5638

Firmware signing capabilities:
  • Apple has firmware signing capabilities for all of their devices, and are the only ones in the world that can boot custom software without exploiting a device.
  • Firmware updates run as a RAM disk on iOS devices, which is similar to booting off of a USB stick.
  • Apple CAN write a custom RAM disk (as a “SIF”), sign it, and boot it on any iOS device from restore or DFU mode to run from memory.
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