On 7/18/12, Mark Andrews <marka@isc.org> wrote: [snip]
space, you meet the requirements. Toss a coin for each bit. Heads = 1, tails = 0. Sure... and if someone says they just happened to toss a coin 128 times, and got "0" all 128 times, therefore legitimately assigned ULA ID is all zeros, I don't believe them.
(1 / 2)^128 * ([128 : 128]) for α = 0.0000000002 H_0: fair coin Observation: 128 heads out of 128 flips (or 128 tails out of 128 flips) For H_0, Prob given >= 128 heads or >= tails = 2*(1 - Prob(<128) ) = < 0.000000000000000000000000000000000006% Reject H_0. Perhaps the world would be well served if the RFC called for routers to apply some [very lenient] randomness tests to the sequence of bits proposed to be configured as a ULA ID.... :) -- -JH