Interesting to see Bitcoin use almost the same principle. Essentially it's "if there is a hash with enough leading zeroes, we can assume a lot of CPU time has b

Interesting to see Bitcoin use almost the same principle. Essentially it's "if there is a hash with enough leading zeroes, we can assume a lot of CPU time has been put into the network." Of course that's just an artifact of what's really happening, which is pseudo-random values + laws of probability.