Messages in this thread | | | Date | Mon, 26 May 2008 15:43:26 +0200 | From | Alejandro Riveira Fernández <> | Subject | Re: [PATCH] drivers/net: remove network drivers' last few uses of IRQF_SAMPLE_RANDOM |
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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/
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