-- On 17 Dec 2004 at 22:51, Major Variola (ret) wrote:
I've been running a 1970s-era lava lamp for some time, and found that it can enter a stable attractor where you get a non-circulating blob o' wax at the bottom. While Walker et al.'s (?) LL video entropy source is cute/clever, the general lesson we can take from this is to be careful that physical sources do not fail.
These days the video entropy source is not a lava lamp, but a lens cap - in the dark, the ccds generate significant thermal noise, which (unlike chaotic noise) cannot fail, unless someone immerses the camera in liquid helium. --digsig James A. Donald 6YeGpsZR+nOTh/cGwvITnSR3TdzclVpR0+pr3YYQdkG YIh62RYRs2hLkj/bbMuhph73iWN9Kmjo6IJ27mBf 4RyyRBC0ayoxtSug4pB9k+d7sjGlnt3gsa6yVYFy5