From: Matt Mackall <mpm@selenic.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Arjan van de Ven <arjan@infradead.org>, Jake Edge <jake@lwn.net>,
security@kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
James Morris <jmorris@namei.org>,
linux-security-module@vger.kernel.org,
Eric Paris <eparis@redhat.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Roland McGrath <roland@redhat.com>,
mingo@redhat.com, Andrew Morton <akpm@linux-foundation.org>,
Greg KH <greg@kroah.com>, Dave Jones <davej@redhat.com>
Subject: Re: [patch] random: make get_random_int() more random
Date: Wed, 6 May 2009 16:10:20 -0500 [thread overview]
Message-ID: <20090506211020.GE31071@waste.org> (raw)
In-Reply-To: <20090506205145.GA1908@elte.hu>
On Wed, May 06, 2009 at 10:51:45PM +0200, Ingo Molnar wrote:
> Linus's patch is a marked improvement, and it is really what we need
> here mostly.
No one's arguing that it isn't an improvement. But -15 years of
research- points to MD4 (let alone **half**MD4) being insufficient. To
counter that, two non-cryptanalysts have presented nothing beyond "it
seems strong enough to me" and "it passes a meaningless test". Pardon
me if I'm not satisfied by that.
> We cannot afford true physical randomness (it's too expensive to get
> and not all hw has it), and even a 'good' PRNG is pretty expensive.
And what of my suggestion (multiple times now) to replace halfMD4 with
SHA1? Or AES. Or any cryptographic primitive that's not known to be
completely worthless?
--
Mathematics is the supreme nostalgia of our time.
next prev parent reply other threads:[~2009-05-06 21:14 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-04 18:51 [PATCH] proc: avoid information leaks to non-privileged processes Jake Edge
2009-05-04 19:00 ` [Security] " Linus Torvalds
2009-05-04 19:51 ` Arjan van de Ven
2009-05-04 20:20 ` Eric W. Biederman
2009-05-04 22:24 ` Linus Torvalds
2009-05-04 23:26 ` Arjan van de Ven
2009-05-04 23:54 ` Linus Torvalds
2009-05-05 7:51 ` Eric W. Biederman
2009-05-05 15:17 ` Linus Torvalds
2009-05-05 15:35 ` Linus Torvalds
2009-05-05 16:18 ` Matt Mackall
2009-05-05 16:10 ` Matt Mackall
2009-05-05 5:50 ` Matt Mackall
2009-05-05 6:31 ` Ingo Molnar
2009-05-05 8:14 ` Eric W. Biederman
2009-05-05 19:52 ` Ingo Molnar
2009-05-05 20:22 ` Matt Mackall
2009-05-05 21:20 ` Eric W. Biederman
2009-05-06 10:33 ` Ingo Molnar
2009-05-06 10:30 ` Ingo Molnar
2009-05-06 16:25 ` Matt Mackall
2009-05-06 16:48 ` Linus Torvalds
2009-05-06 17:57 ` Matt Mackall
2009-05-07 0:50 ` Matt Mackall
2009-05-07 15:02 ` Ingo Molnar
2009-05-07 18:14 ` Matt Mackall
2009-05-07 18:21 ` Ingo Molnar
2009-05-07 18:41 ` Ingo Molnar
2009-05-07 19:24 ` Matt Mackall
2009-05-07 15:16 ` Florian Weimer
2009-05-07 16:55 ` Matt Mackall
2009-05-07 17:53 ` Linus Torvalds
2009-05-07 18:42 ` Matt Mackall
2009-05-06 20:09 ` [patch] random: make get_random_int() more random Ingo Molnar
2009-05-06 20:41 ` Matt Mackall
2009-05-06 20:51 ` Ingo Molnar
2009-05-06 21:10 ` Matt Mackall [this message]
2009-05-06 21:24 ` Ingo Molnar
2009-05-14 22:47 ` Jake Edge
2009-05-14 22:55 ` [Security] " Linus Torvalds
2009-05-15 13:47 ` Ingo Molnar
2009-05-15 15:10 ` Jake Edge
2009-05-16 10:00 ` Willy Tarreau
2009-05-16 10:39 ` Ingo Molnar
2009-05-16 12:02 ` Eric W. Biederman
2009-05-16 14:00 ` Michael S. Zick
2009-05-16 14:28 ` Michael S. Zick
2009-05-16 14:57 ` Arjan van de Ven
2009-05-16 15:09 ` Michael S. Zick
2009-05-16 14:32 ` Matt Mackall
2009-05-16 13:58 ` Willy Tarreau
2009-05-16 15:23 ` Linus Torvalds
2009-05-16 15:47 ` Willy Tarreau
2009-05-16 15:54 ` Oliver Neukum
2009-05-16 16:05 ` Linus Torvalds
2009-05-16 16:17 ` Linus Torvalds
2009-05-15 1:16 ` Américo Wang
2009-05-06 20:25 ` [Security] [PATCH] proc: avoid information leaks to non-privileged processes Ingo Molnar
2009-05-06 20:52 ` Matt Mackall
2009-05-05 8:58 ` Andi Kleen
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