If those kind of devices interest you, I&#x27;m quite intrigued by the IDQuantique ones that are based on quantum physics to generate randomness. They have a USB product that has a random stream of 4Mbits&#x2F;sec and is used by lotteries and gambling sites.<p><a href="http:&#x2F;&#x2F;www.idquantique.com&#x2F;random-number-generation&#x2F;quantis-random-number-generator&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.idquantique.com&#x2F;random-number-generation&#x2F;quantis-...</a>