full-disclosure - Re: DakaRand

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Message-ID: <CAH8yC8m+b01xOgYZgNLS8N7DoT6Su8xBE4mxiv6c7fW44anQYQ@mail.gmail.com>
Date: Sun, 19 Aug 2012 18:51:43 -0400
From: Jeffrey Walton <noloader@...il.com>
To: Dan Kaminsky <dan@...para.com>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: DakaRand

On Sun, Aug 19, 2012 at 6:12 PM, Dan Kaminsky <dan@...para.com> wrote:
>
>
> On Sun, Aug 19, 2012 at 3:03 PM, Ben Laurie <ben@...ks.org> wrote:
>>
>> On Sun, Aug 19, 2012 at 9:28 PM, Dan Kaminsky <dan@...para.com> wrote:
>> >
>> > On Sun, Aug 19, 2012 at 10:13 AM, Ben Laurie <ben@...ks.org> wrote:
>> >>
>> >> On Sun, Aug 19, 2012 at 5:42 PM, Dan Kaminsky <dan@...para.com> wrote:
>> >> > entropy gathering has gotten *worse* (via abandonment of interrupts),
>> >> > not
>> >> > better.
>> >>
>> >> Entropy gathering in _one particular OS_. Credit where its due, please.
>> >
>> >
>> > My understanding is that bad keys were detected on more than just Linux,
>> > which implies starvation on everything on everything not out of Redmond.
>> >
>> > What interesting approaches are you aware of that deserve credit?  Not a
>> > rhetorical question, I'm genuinely curious.
>>
>> I was referring to the abandonment of interrupts in Linux. You think
>> that other OSes have got worse at entropy gathering? And when did
>> "more than Linux" start implying "not Windows"?
>
>
> My assumption is that the other Unixes weren't looking at interrupt timing
> to begin with, i.e. they've always been as starved for entropy as Linux
> eventually became.  That being said, does VXWorks even *have* an OS provided
> strong random number generator?
>
> Windows has CryptGenRandom, which AFAIK doesn't block, and survives
> everything but VM suspend/restore.

A bit dated:
* Analysis of the Linux Random Number Generator, eprint.iacr.org/2006/086.pdf
* Cryptanalysis of the Random Number Generator of the Windows
Operating System, eprint.iacr.org/2007/419.pdf

Most recent analysis of Linux RNG (AFAIK):
* Mining Your Ps and Qs: Detection of Widespread Weak Keys in Network
Devices, https://factorable.net/paper.html

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