From: "Jörn Engel" <joern@logfs.org>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Jeff Garzik <jgarzik@pobox.com>,
David Safford <safford@us.ibm.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Leonidas Da Silva Barbosa <leosilva@linux.vnet.ibm.com>,
Ashley Lai <ashley@ashleylai.com>,
Rajiv Andrade <mail@srajiv.net>,
Marcel Selhorst <tpmdd@selhorst.net>,
Sirrix AG <tpmdd@sirrix.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"Ted Ts'o" <tytso@mit.edu>, Kent Yoder <key@linux.vnet.ibm.com>,
David Safford <safford@watson.ibm.com>,
Mimi Zohar <zohar@us.ibm.com>,
"Johnston, DJ" <dj.johnston@intel.com>
Subject: Re: TPMs and random numbers
Date: Thu, 12 Sep 2013 18:23:09 -0400 [thread overview]
Message-ID: <20130912222309.GH3809@logfs.org> (raw)
In-Reply-To: <CALCETrWp_QSstE1NB_bB6uWLEJNcT5NmcuK9MRRQjmGFpy6b=w@mail.gmail.com>
On Thu, 12 September 2013 16:51:15 -0700, Andy Lutomirski wrote:
>
> Supposedly, the Linux entropy pool has the property that mixing in
> even actively malicious data is no worse than not mixing in anything
> at all.
It is worse in three ways:
- it costs performance,
- it may create a false sense of safety and
- it actively does harm if we credit it as entropy.
How much weight you assign to each of those is up to you. So long as
we don't credit any of it as entropy, I am not too adverse to mixing
it in. But I can equally see benefit in burning the bridges.
Jörn
--
There are two ways of constructing a software design: one way is to make
it so simple that there are obviously no deficiencies, and the other is
to make it so complicated that there are no obvious deficiencies.
-- C. A. R. Hoare
next prev parent reply other threads:[~2013-09-12 23:58 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-11 17:22 TPMs and random numbers David Safford
2013-09-11 17:49 ` Andy Lutomirski
2013-09-11 18:45 ` Theodore Ts'o
2013-09-11 19:06 ` Jeff Garzik
2013-09-11 19:08 ` Andy Lutomirski
2013-09-11 19:25 ` H. Peter Anvin
2013-09-11 20:28 ` Theodore Ts'o
2013-09-11 20:44 ` H. Peter Anvin
2013-09-11 18:47 ` David Safford
2013-09-12 21:57 ` Jörn Engel
2013-09-12 23:38 ` Andy Lutomirski
2013-09-12 23:39 ` Jeff Garzik
2013-09-12 22:13 ` Jörn Engel
2013-09-12 23:51 ` Andy Lutomirski
2013-09-12 22:23 ` Jörn Engel [this message]
2013-09-13 2:13 ` Theodore Ts'o
2013-09-13 2:22 ` Jörn Engel
2013-09-11 22:08 ` Johnston, DJ
-- strict thread matches above, loose matches on Subject: below --
2013-09-09 21:11 H. Peter Anvin
2013-09-11 1:50 ` Andy Lutomirski
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