Cloudflare uses lava lamps as a random number generator

I&#x27;m now looking forward to a future article from security researchers:<p>&quot;Prediction of a random stream from a lava lamp model constructed from entropic data inferred from encrypted packets&quot;

So they created a giant side-channel by putting their entropy-source next to a public window?

I would use plasma spheres (e.g. [0], but there are lots of them out there). A single plasma sphere generates a visual display that changes much faster and is much less predictable moment-to-moment than a lava lamp -- so you wouldn&#x27;t need nearly so many of them -- and uses much less power into the bargain.<p>[0] <a href="https:&#x2F;&#x2F;www.scientificsonline.com&#x2F;product&#x2F;nebula-plasma-ball" rel="nofollow">https:&#x2F;&#x2F;www.scientificsonline.com&#x2F;product&#x2F;nebula-plasma-ball</a>

Is this a perfect rng at the current state of technology? If not, why and are there currently perfect ones. What would an rng require to be perfect?

Nothing new here, move along.<p>This was first done by SGI ages ago...<p>joe