My interest is making entropy sources using simple and commonly available components like webcams and Zener diodes. These can then be the foundations of your own true random number generators (TRNGs) you can rely on to not have been compromised by governments or their agencies.
Or things like the Photonic Instrument, which produces entropy at over 200kbps:-
Visit http://www.reallyreallyrandom.com/photonic/live-entropy/ to see it running on-line.
And the Zenerglass, an avalanche diode based entropy source:-
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