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Re: [Libreboot] Password protected Grub entries


From: The Gluglug
Subject: Re: [Libreboot] Password protected Grub entries
Date: Wed, 20 May 2015 12:16:50 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.6.0

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On 20/05/15 11:30, Beni wrote:
> To replace a hard drive in a laptop you need to open up at least
> one screw. If you don't seal your screws and let people open up
> your laptop, you've got a problem anyway. Everyone can read your
> libreboot rom and reflash another rom, e.g. one that logs your
> passphrase somewhere. So that's dangerous anyway.

You can write-protect the flash chip, in a way that then requires
external flashing (SPI programmer needed, in other words). This also
isn't perfect because the attacker can probably use a SPI flasher, but
with a randomized seal as you have pointed out, you can detect if this
has occurred.
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