using "reserved" IPv6 space
Jimmy Hess
mysidia at gmail.com
Thu Jul 19 03:00:43 UTC 2012
On 7/18/12, Mark Andrews <marka at 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
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