At 08:39 AM 7/23/02 +0200, Eugen Leitl wrote:
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
At 10:59 PM 7/22/02 -0700, [EMAIL PROTECTED] wrote:
Entropy is not quite a physical quantity -- rather it is on the
slippery edge between being a physical thing and a philosophical
thing. If you are not careful, you will slip into a deep epistemic
bog and find yourself needing to ask how do
Eugen Leitl wrote:
Is there any point in compressing the video before running it through a
cryptohash?
No. (assuming you're talking about lossless compression)
In general, any invertible transformation neither adds or subtracts
entropy, and hence is extremely unlikely to make any difference
- Original Message -
From: Eugen Leitl [EMAIL PROTECTED]
Subject: Re: building a true RNG (was: Quantum Computing ...)
I've got a 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
John S. Denker [EMAIL PROTECTED] writes:
Is there any point in compressing the video before running it through a
cryptohash?
There might be a minor point, namely computational efficiency.
I can't believe any compression software could be as fast as just
feeding the signal straight into
At 10:59 PM 7/22/02 -0700, [EMAIL PROTECTED] wrote:
Entropy is not quite a physical quantity -- rather it is on the
slippery edge between being a physical thing and a philosophical
thing. If you are not careful, you will slip into a deep epistemic
bog and find yourself needing to ask how
On 24 Jul 2002, Paul Crowley wrote:
I can't believe any compression software could be as fast as just
feeding the signal straight into SHA-1.
I haven't tried this, but assuming I'm digitizing dark video and only get
noise in the lower significant bits I can just mask out the constant
(zero)
