The government method for cracking a piece of storage evidence is straight forward.
Rule 1. Clone your storage device on the bit level.
The FBI and NSA would've done this and this alone circumvents the number of failed pin attempts to get into the iPhone. At that point, they could just set up the storage image with an iPhone simulator or numerous devices and script as many pin attempts as they wish.
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The government method for cracking a piece of storage evidence is straight forward. Rule 1. Clone your storage device on the bit level. The FBI and NSA would've done this and this alone circumvents the number of failed pin attempts to get into the iPhone. At that point, they could just set up the storage image with an iPhone simulator or numerous devices and script as many pin attempts as they wish.