linux-kernel - Re: [GIT PULL] fscrypt updates for 4.18

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Message-ID: <20180605170208.GE7839@thunk.org>
Date:   Tue, 5 Jun 2018 13:02:08 -0400
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     Richard Weinberger <richard@...ma-star.at>
Cc:     Richard Weinberger <richard.weinberger@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-fscrypt@...r.kernel.org
Subject: Re: [GIT PULL] fscrypt updates for 4.18

On Tue, Jun 05, 2018 at 06:10:24PM +0200, Richard Weinberger wrote:
> That's the question. I understand the use case, but I fear attack scenarios
> where someone manages to downgrade the crypto of my phone.
> This is why I was asking whether Android tells me whether Speck is used or not.
> "it does encryption" is clearly not enough.

An attack scenario where someone manages to downgrade the crypto of
your phone would require replacing your kernel and your /system
partition --- at which point, you've got other problems.  :-)

	      	       	      	     	 - Ted