lkml.org 
[lkml]   [2008]   [May]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] drivers/net: remove network drivers' last few uses of IRQF_SAMPLE_RANDOM
El Sun, 25 May 2008 19:27:12 -0400
Theodore Tso <tytso@MIT.EDU> escribió:

> On Mon, May 26, 2008 at 12:39:49AM +0930, Glen Turner wrote:
> >
> > For example, /dev/random has run out. So the output of /dev/urandom
> > is now determined by previous values of /dev/random. I then send in
> > a stack of network packets at regular intervals. So the output of
> > /dev/urandom is now greatly determined by those packets. My search
> > space for the resulting key is small since /dev/urandom appears to
> > be random, but in fact is periodic.
>
> That's not how it works. Basically, as long as there is *some*
> entropy in the system, even from the /var/lib/random-seed, or from
> keyboard interrupts, or from mouse interrupts, which is unknown to the
> attacker, in the worse case /dev/urandom will be no worse than a
> cryptographic random number generator.
>
[ ... ]

Just a shot in the dark... would hw sensors (raw data) chips be a good source
of entropy for /dev/random ??

> - Ted
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2008-05-26 15:47    [W:0.146 / U:0.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site