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Windows 11 BitLocker Bypassed to Extract Encryption Keys
(gbhackers.com)
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this post was submitted on 06 Jan 2025
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Is this really a BitLocker issue or more an issue inherent in the hardware design?
EDIT: Okay, looks like Microsoft could do better:
But maybe the hardware/UEFI should immediately wipe memory upon restarting anyway..?
The key has to be stored somewhere to be able to use it. This is full disk encryption, so every single sector that is read or written (except some boot and kernel stuff, presumably) needs to go through that encryption key. You could maybe store it in a cryptographic coprocessor that uses SRAM for the key and key schedule, but those are very uncommon now that AES-NI is popular. And I don't think AES-NI has any special registers that could help here.