Date: Tue, 26 Apr 2016 21:16:39 +0100
From: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Pavel Machek <pavel@ucw.cz>,
        Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
        Greg KH <gregkh@linuxfoundation.org>,
        Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@suse.de>,
        Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        "open list:STAGING SUBSYSTEM" <devel@driverdev.osuosl.org>,
        Ingo Molnar <mingo@kernel.org>,
        Kristen Carlson Accardi <kristen@linux.intel.com>,
        "open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
        open list <linux-kernel@vger.kernel.org>,
        Mathias Krause <minipli@googlemail.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Wan Zongshun <Vincent.Wan@amd.com>
Subject: Re: [PATCH 0/6] Intel Secure Guard Extensions
Message-ID: <20160426211639.06ff520f@lxorguk.ukuu.org.uk>
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	<CALCETrVVjkppY=pG3CtLWcnP0WMGWJdKVH6CnKxw56gqn0D_1g@mail.gmail.com>
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	<CALCETrXNW8GiqMwj8rrBOv6cGYDsgQ238m5NrMDFqTA173iyoA@mail.gmail.com>
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> Replay Protected Memory Block.  It's a device that allows someone to
> write to it and confirm that the write happened and the old contents
> is no longer available.  You could use it to implement an enclave that
> checks a password for your disk but only allows you to try a certain
> number of times.

rpmb is found in a load of hardware today notably MMC/SD cards. Android
phones often use it to store sensitive system data.

Alan