--
On 22 Jul 2002 at 15:39, David Honig wrote:
You should be able to use any source which you know is not a
PRNG as the entropy-source in a true RNG. You should be able to
use entropy (and stat tests) to measure the source entropy after
digitization.
You cannot measure entropy
On Mon, 22 Jul 2002, David Honig wrote:
Yes, it is a joke. However, it is also a viable if low-bandwidth
entropy source. I disagree that you need to be able to model
I've got a framegrabber with a 640x480 24 bit/pixel camera. It doesn't
compress, is rather noisy, and since self-adjusting I
John S. Denker [EMAIL PROTECTED] writes:
Source -- Digitizer -- Simple hash -- Whitener (e.g., DES)
OK, we have DES as an example of a whitener.
-- Can somebody give me an example of a simple hash
that performs irreversible compression of the required
kind?
I can give you a number of
Eugen Leitl wrote:
... framegrabber with a 640x480 24 bit/pixel camera. It doesn't
compress, is rather noisy, and since self-adjusting I get the maximum
entropy at maximum darkness.
OK. Evidently it's dominated by thermal noise, not to
be confused with the Poisson noise recently featured
On Mon, 22 Jul 2002, John S. Denker wrote:
David Honig wrote yet another nice note:
I'm not trying to be dense, but I'm totally not
understanding the distinction here. The following
block diagram is excellent for focussing the discussion,
(thanks):
Source -- Digitizer -- Simple hash --
On Tue, 23 Jul 2002, John S. Denker wrote:
-- I am told (but don't understand) that there might exist
a weaker hash that somehow does require whitening. This
is the point of the conversation. Please address this
point if you can.
Perhaps they were refering to something like
