Flaw with lava lamp entropy source

[John Kelsey]

>From: "James A. Donald" <jamesd at echeque.com>
>Sent: Dec 18, 2004 2:51 PM
>To: "cypherpunks at al-qaeda.net" <cypherpunks at al-qaeda.net>
>Subject: Re: Flaw with lava lamp entropy source

...
>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. 

Do you (does anyone) know of any papers that have formally analyzed this entropy source?  

>    --digsig
>         James A. Donald

--John