From: Phillip Susi <psusi@cfl.rr.com>
To: David Wagner <daw-usenet@taverner.cs.berkeley.edu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Entropy Pool Contents
Date: Mon, 27 Nov 2006 15:38:42 -0500 [thread overview]
Message-ID: <456B4CD2.7090208@cfl.rr.com> (raw)
In-Reply-To: <ekfehh$kbu$1@taverner.cs.berkeley.edu>
David Wagner wrote:
> Nope, I don't think so. If they could, that would be a security hole,
> but /dev/{,u}random was designed to try to make this impossible, assuming
> the cryptographic algorithms are secure.
>
> After all, some of the entropy sources come from untrusted sources and
> could be manipulated by an external adversary who doesn't have any
> account on your machine (root or non-root), so the scheme has to be
> secure against introduction of maliciously chosen samples in any event.
Assuming it works because it would be a bug if it didn't is a logical
fallacy. Either the new entropy pool is guaranteed to be improved by
injecting data or it isn't. If it is, then only root should be allowed
to inject data. If it isn't, then the entropy estimate should increase
when the pool is stirred.
next prev parent reply other threads:[~2006-11-27 20:38 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-22 23:54 Entropy Pool Contents Gunter Ohrner
2006-11-22 23:59 ` Gunter Ohrner
2006-11-23 0:10 ` Jan Engelhardt
2006-11-23 21:40 ` Gunter Ohrner
2006-11-27 16:16 ` Phillip Susi
2006-11-27 16:19 ` Chris Friesen
2006-11-27 18:54 ` Phillip Susi
2006-11-27 19:33 ` David Wagner
2006-11-27 20:38 ` Phillip Susi [this message]
2006-11-27 20:40 ` David Wagner
2006-11-27 21:52 ` Kyle Moffett
2006-11-28 4:17 ` David Wagner
2006-11-28 5:19 ` Ben Pfaff
2006-11-28 12:13 ` Henrique de Moraes Holschuh
2006-11-28 12:58 ` David Wagner
2006-11-28 13:32 ` Eran Tromer
2006-11-28 13:15 ` Martin Mares
2006-11-28 17:22 ` Phillip Susi
2006-11-28 17:24 ` Martin Mares
2006-11-28 17:46 ` Phillip Susi
2006-11-28 17:49 ` Martin Mares
2006-11-28 18:40 ` Phillip Susi
2006-11-28 21:05 ` Martin Mares
2006-11-29 20:04 ` Phillip Susi
2006-11-28 17:42 ` Phillip Susi
2006-11-28 17:59 ` Martin Mares
2006-11-28 22:50 ` Eran Tromer
2006-11-27 22:21 ` Gunter Ohrner
2006-11-24 0:48 ` Theodore Tso
2006-11-24 1:01 ` Jeff Garzik
2006-11-23 20:54 ` Lennart Sorensen
2006-11-23 21:34 ` Gunter Ohrner
2006-11-23 21:04 ` Jeff Garzik
2006-11-23 21:43 ` Gunter Ohrner
2006-11-26 1:26 ` Folkert van Heusden
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