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Date:   Thu, 7 Dec 2017 15:32:09 +0000
From:   Alan Cox <>
To:     "Luis R. Rodriguez" <>
Cc:     "AKASHI, Takahiro" <>,
        Mimi Zohar <>,
        Greg Kroah-Hartman <>,
        Linus Torvalds <>,
        Jan Blunck <>,
        Julia Lawall <>,
        David Howells <>,
        Marcus Meissner <>, Gary Lin <>,,
        linux-efi <>,, Matthew Garrett <>
Subject: Re: Firmware signing -- Re: [PATCH 00/27] security, efi: Add kernel

> I am curious though, is the above notion of having hardware require signed
> firmware an implication brought down by UEFI? If so do you have any pointers
> to where this is stipulated? Or is it just a best practice we assume some
> manufacturers are implementing?

It's a mix of best practice and meeting the so called 'secure boot'
requirements. In the non Linux space exactly the same problems exist in
terms of trusting devices and firmware, building a root of trust and even
more so when producing 'hardened' platforms.

Some stuff isn't - USB devices for example don't get to pee on random
memory so often isn't signed.


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