From: not@telling.you.invalid   
      
   Richard Kettlewell  wrote:   
   > From the original article:   
   >   
   >    As deterministic systems, classical computers cannot create true   
   >    randomness on demand. As a result, to offer true randomness in   
   >    classical computing, we often resort to specialized hardware that   
   >    harvests entropy from unpredictable physical sources, for instance,   
   >    by looking at mouse movements, observing fluctuations in   
   >    temperature, monitoring the movement of lava lamps or, in extreme   
   >    cases, detecting cosmic radiation. These measures are unwieldy,   
   >    difficult to scale and lack rigorous guarantees, limiting our   
   >    ability to verify whether their outputs are truly random.   
   >   
   > Physical sources can be found in pretty much every commodity CPU for the   
   > last decade . So not that "difficult to scale" apparently.   
      
   Simple circuits using the (ancient) 2N3904 transistor abound on the   
   internet, and pre-date it as well.   
      
   Here's a newer circuit design specifically for battery-powered   
   cryptographic use and with lots of analysis and comparison with   
   another circuit:   
   https://betrusted.io/avalanche-noise   
      
   None of it requires cutting-edge technology. The main issue in the   
   past has simply been that it wasn't part of the original PC   
   architecture, so things like "looking at mouse movements" needed to   
   be done at first until it was added to modern hardware.   
      
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