linux-kernel - Re: [PATCH v2] modsign: use shred to overwrite the private key before deleting it

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Message-ID: <54C383E0.9060408@ahsoftware.de>
Date:	Sat, 24 Jan 2015 12:37:04 +0100
From:	Alexander Holler <holler@...oftware.de>
To:	linux-kernel@...r.kernel.org
CC:	linux-kbuild@...r.kernel.org, Michal Marek <mmarek@...e.cz>,
	David Howells <dhowells@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH v2] modsign: use shred to overwrite the private key before
 deleting it

Am 24.01.2015 um 11:45 schrieb Alexander Holler:

> It uses shred, in the hope it will somedays learn how to shred stuff on
> FLASH based devices securely too, once that has become possible.

BTW: This is a good example where technology failed to keep the needs of 
users in mind.

It should be relatively easy to make that possible: Using secure trim 
which erases blocks instead of just marking them as free, it should be 
possible without much effort for file systems to implement a secure 
unlink. An obvious name would be sunlink(2). Or does such already exist? 
I've seen secure trim already exists for some devices, but not sunlink().

Regards,

Alexander Holler
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