Re: [PATCH 2/2] lguest: virtio-rng support

From: Christian Borntraeger
Date: Sat May 17 2008 - 03:47:25 EST


Am Samstag, 17. Mai 2008 schrieb Herbert Xu:
> On Sat, May 17, 2008 at 04:28:03PM +1000, Rusty Russell wrote:
> >
> > But you did not address the DoS question: can we ignore it? Or are we
trading
> > off a DoS in the host against a potential security weakness in the guest?
>
> Why not do both? Use the host's urandom to make the guest at least
> unpredictable on start-up without increasing the guest's entropy,
> and use the host's random to actually increase the guest's entropy.

I think the proper solution would be to use the hosts /dev/hw_rng - if
available.
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