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Date:      Tue, 25 Sep 2012 11:36:31 +0200
From:      Mariusz Gromada <mariusz.gromada@gmail.com>
To:        Ben Laurie <benl@freebsd.org>
Cc:        freebsd-security@freebsd.org, RW <rwmaillists@googlemail.com>, Jonathan Anderson <jonathan.anderson@cl.cam.ac.uk>, Pawel Jakub Dawidek <pjd@freebsd.org>, John Baldwin <jhb@freebsd.org>
Subject:   Re: Collecting entropy from device_attach() times.
Message-ID:  <CANsh1da6ti9_97bhtOwjC4B8GW3Bn%2B==d67GDsJqBV4oTZgh1Q@mail.gmail.com>
In-Reply-To: <CANsh1da59oRAB%2B1OsdoHXKe-ushoy16g2=rfXg_2-MjUevGCqA@mail.gmail.com>
References:  <20120918211422.GA1400@garage.freebsd.pl> <20120919231051.4bc5335b@gumby.homeunix.com> <20120920102104.GA1397@garage.freebsd.pl> <201209200758.51924.jhb@freebsd.org> <20120922080323.GA1454@garage.freebsd.pl> <20120922195325.GH1454@garage.freebsd.pl> <505E59DC.7090505@gmail.com> <20120923151706.GN1454@garage.freebsd.pl> <5060D723.6020305@gmail.com> <CAG5KPzxf0Rfufk5K6Jt4e85xc7zXY_B3a2Sq0Uf_uVLHbV-baw@mail.gmail.com> <CANsh1da59oRAB%2B1OsdoHXKe-ushoy16g2=rfXg_2-MjUevGCqA@mail.gmail.com>

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2012/9/25 Mariusz Gromada <mariusz.gromada@gmail.com>
>
> Empirically, it seems to me that these numbers are actually unlikely
>> to be correlated with each other, but that has not been tested.
>>
>
>
> Another yes, you are right. We need much more data to check if we have a
> stochastic process consisted of independent random variables.
>
>

Here we did some initial testing, mainly based on charts, which showed
typical noise in time. But again, it requires a formal proof.



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