linux-kernel - Re: [PATCH 0/6] Intel Secure Guard Extensions

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Message-ID: <20160426211639.06ff520f@lxorguk.ukuu.org.uk>
Date:	Tue, 26 Apr 2016 21:16:39 +0100
From:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Pavel Machek <pavel@....cz>,
	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	Andy Lutomirski <luto@...nel.org>,
	Borislav Petkov <bp@...e.de>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	"open list:STAGING SUBSYSTEM" <devel@...verdev.osuosl.org>,
	Ingo Molnar <mingo@...nel.org>,
	Kristen Carlson Accardi <kristen@...ux.intel.com>,
	"open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>,
	Mathias Krause <minipli@...glemail.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Wan Zongshun <Vincent.Wan@....com>
Subject: Re: [PATCH 0/6] Intel Secure Guard Extensions

> 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