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Date: Wed, 24 Jun 2015 10:45:50 +0200
From: Pavel Machek <pavel@ucw.cz>
To: Stephan Mueller <smueller@chronox.de>
Cc: Ted Tso <tytso@mit.edu>, linux-crypto@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] random: add random_initialized command line param
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On Tue 2015-06-23 23:47:33, Stephan Mueller wrote:
> Am Dienstag, 23. Juni 2015, 22:44:11 schrieb Pavel Machek:
> 
> Hi Pavel,
> 
> > On Mon 2015-05-18 18:25:25, Stephan Mueller wrote:
> > > Make the threshold at which the output entropy pools are considered to
> > > be initialized configurable via a kernel command line option. The
> > > current integer value of 128 bits is a good default value. However, some
> > > user groups may want to use different values. For example, the SOGIS
> > > group now requires 125 bits at least (BSI, the participant at that group
> > > used to require 100 bits). NIST moved from 80 bits to 112 bits starting
> > > with 2014.
> > > 
> > > It is therefore to be expected that in the future, this threshold may
> > > increase for different user groups.
> > 
> > Speaking of random and kernel parameters... should we add random=<hex
> > digits> parameter to pass entropy from bootloader to the kernel?
> 
> Everybody can see that string. How do you think that way of providing entropy 
> is protected?

Only local users, not remote attackers. And yes, we should probably
"censor" the command line for this use.
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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