On 01/03/2013 05:25 AM, Oleg Goldshmidt wrote: There is an additional > instruction, RDSEED, that is "supposedly" truly random, but, as I > mentioned, I have not seen an explanation of why it is or how it > works. perhaps they use radioactive decay? Scroll down to "Geiger Counter" at: http://www.sparkfun.com/news/782