linux-kernel - Re: [PATCH 0/2] Secure deletion under JFFS2

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Message-ID: <CAFLxGvyqZNLeRgxGvNNnc-zsPydYLisEB3eX0R5CVCEhEuN4QQ@mail.gmail.com>
Date:   Sun, 22 Jul 2018 21:06:00 +0200
From:   Richard Weinberger <richard.weinberger@...il.com>
To:     Theuns Verwoerd <theuns.verwoerd@...iedtelesis.co.nz>
Cc:     David Woodhouse <dwmw2@...radead.org>,
        "linux-mtd @ lists . infradead . org" <linux-mtd@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2] Secure deletion under JFFS2

On Fri, Jul 20, 2018 at 1:50 AM, Theuns Verwoerd
<theuns.verwoerd@...iedtelesis.co.nz> wrote:
> Security certifications such as FIPS require the capability to securely
> delete files, which is problematic under JFFS2's log-based model.  We can

Can you please be a little more specific about the certifications?

These days secure deletion at file system level is almost impossible to achieve
since you don't have full control of the storage stack.
I know, I know, In the raw flash case we have, but still. It makes
things very complicated.

A common approach do delete a file in a secure way is having it
encrypted and upon deletion
you forget the key.
Wouldn't that work for you too?

-- 
Thanks,
//richard