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A comment on Law Enforcement Is Accessing Locked Devices. Parent comment

Re:Law Enforcement Is Accessing Locked Devices by m463 on Wednesday December 09, 2020 @03:52PM (#25364746)
What about the iphone POWER+VOLDOWN thing that flushes the biometric keys and requires the pin?
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Re:Law Enforcement Is Accessing Locked Devices by chenxiaolong on Friday December 11, 2020 @02:05PM (#25389381)
Looking at the iOS platform security document ([0] page 68), apps use NSFileProtectionCompleteUntilFirstUserAuthentication by default, which keeps keys in memory after the first unlock, regardless of the Power + Volume Down lock. If an app opts into NSFileProtectionComplete, I believe the keys are purged from memory upon locking.

[0] https://manuals.info.apple.com/MANUALS/1000/MA1902/en_US/app...

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