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Breaking Bitlocker - Bypassing the Windows Disk Encryption (www.youtube.com)

submitted 1 month ago by Kissaki@programming.dev to c/cybersecurity@infosec.pub

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[–] Laser@feddit.org 3 points 1 month ago (2 children)

It is (was?) actually worse

https://neodyme.io/en/blog/bitlocker_screwed_without_a_screwdriver/#teaser

[–] frongt@lemmy.zip 4 points 1 month ago (1 children)

it is pretty much applicable to all devices using the default BitLocker “Device Encryption” setup, as this configuration relies solely on Secure Boot to automatically unseal the disk during boot.

That is, only the default "transparent" bitlocker mode. If you have any other additional protection (pin, password) set it doesn't affect you.

[–] Onomatopoeia@lemmy.cafe 3 points 1 month ago (2 children)

Why would anyone use the "transparent" mode? Seems rather pointless.

[–] frongt@lemmy.zip 1 points 1 month ago

People who prefer that much convenience vs security.

[–] Object@sh.itjust.works 1 points 1 month ago

The TPM takes "measurements" of the system and releases the decryption key only if they're all correct. Files on the disk are encrypted, so booting into another OS with a bootable media doesn't work (measurement picks up the fact that you booted into another OS). When the system does boot properly, the Windows lock screen prevents you from viewing the files.

[–] Kissaki@programming.dev 1 points 1 month ago

Thank you for sharing. Very interesting.

We're currently evaluating and rolling out encryption at work, so being informed about the limits of these setups is quite good - even if it's not actually my task to work on those.