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Contrary to popular belief, terrorist cells are not using US-based tech company software to discuss and plan out attacks. Paris and the San Bernadino attacks were planned out in person with little to no online footprint.
But the truth is that even if this feature is enabled on the device in question, the FBI doesn't need to worry about it, because they can already bypass it by backing up part of the phone (called the “Effaceable Storage”) before attempting to guess the passcode. I'll go into the technical details (which the FBI surely already knows) below.
When iOS decides to wipe out user data because the passcode guess limit has been reached (or for any other reason), it doesn’t actually erase all the data from its underlying storage; that would actually take several minutes. Instead, it just destroys one of the keys that protects the data, rendering that data permanently unreadable. The key that is erased in this case is called the “file system key”—and (unlike the hardwired “UID” key that we discussed in our previous blog post) it is not burned into the phone’s processor, but instead merely stored in what Apple calls “Effaceable Storage,” which is just a term for part of the flash memory of the phone designed to be easily erasable.
So the file system key (which the FBI claims it is scared will be destroyed by the phone’s auto-erase security protection) is stored in the Effaceable Storage on the iPhone in the “NAND” flash memory. All the FBI needs to do to avoid any irreversible auto erase is simple to copy that flash memory (which includes the Effaceable Storage) before it tries 10 passcode attempts. It can then re-try indefinitely, because it can restore the NAND flash memory from its backup copy.
The FBI can simply remove this chip from the circuit board (“desolder” it), connect it to a device capable of reading and writing NAND flash, and copy all of its data. It can then replace the chip, and start testing passcodes. If it turns out that the auto-erase feature is on, and the Effaceable Storage gets erased, they can remove the chip, copy the original information back in, and replace it. If they plan to do this many times, they can attach a “test socket” to the circuit board that makes it easy and fast to do this kind of chip swapping.
In short, they're asking the public to grant them significant new powers that could put all of our communications infrastructure at risk, and to trust them to not misuse these powers. But they're deliberately misleading the public (and the judiciary) to try to gain these powers. This is not how a trustworthy agency operates. We should not be fooled.
In short, they're asking the public to grant them significant new powers that could put all of our communications infrastructure at risk, and to trust them to not misuse these powers. But they're deliberately misleading the public (and the judiciary) to try to gain these powers. This is not how a trustworthy agency operates. We should not be fooled.
originally posted by: DJW001
a reply to: MystikMushroom
The object is to get every user agreement-- which no-one ever reads before signing-- to waive the right to require a search warrant for the FBI to use evidence it gathers from personal electronic devices as evidence in court.