Re: The Onion on Lava Lamps

From: Koen Holtman (
Date: Wed Feb 14 2001 - 13:56:21 PST

I believe most of the camera noise is thermal noise inside the recording
CCD, so it would be a fairly good source of randomness.


On Wed, 14 Feb 2001, Robert S. Thau wrote:

> Strata Rose Chalup writes:
> > Are there lower-wattage sources of random input for cryptographic key
> > generation to fall back on?
> A well-populated fishtank would do the job, one would imagine.
> (Incidentally, *any* webcam will have some random camera noise, even
> if the lens is just pointed at a white sheet --- I'm not sure I know
> the entropy of that noise, but it's probably suitable for some
> purposes... ).
> rst

This archive was generated by hypermail 2b29 : Fri Apr 27 2001 - 23:17:42 PDT