lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 11 Aug 2014 15:11:03 -0700
From:	"H. Peter Anvin" <>
To:	Amit Shah <>,
CC:	Rusty Russell <>,
	Virtualization List <>,
	kvm list <>,,, Amos Kong <>,,,
Subject: Re: [PATCH 1/1] virtio: rng: add derating factor for use by hwrng

On 08/11/2014 11:49 AM, Amit Shah wrote:
> The khwrngd thread is started when a hwrng device of sufficient
> quality is registered.  The virtio-rng device is backed by the
> hypervisor, and we trust the hypervisor to provide real entropy.  A
> malicious hypervisor is a scenario that's ruled out, so we are certain
> the quality of randomness we receive is perfectly trustworthy.  Hence,
> we use 100% for the factor, indicating maximum confidence in the source.
> Signed-off-by: Amit Shah <>

It isn't "ruled out", it is just irrelevant: if the hypervisor is
malicious, the quality of your random number source is the least of your


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists