Re: [NSIS] AD Review comments on draft-ietf-nsis-req-07.txt

Allison Mankin wrote:

> Globally unique means a reasonably quite pseudo-random number
> (because it isn't good to have the resources id'd as someone else's)
> or a value that is sure to be unique.
> 
> I'm not asking the document to take these ramblings in...just raising
> thoughts.

The interim meeting slides have an 'analysis' of the collision 
probability for different random number lengths, which were 
significantly lower than any other reasonable failure probabilities and 
similar to the probability that Earth will be obliterated by a meteor, 
from my recollection.

I also believe that are no reasonable alternatives unless one assumes

1) every originator has a DNS name that is guaranteed to be unique and 
that it has easy access to (this isn't true without a working inverse 
mapping)

or

2) every originator has a globally unique IP address (clearly iffy)

or

3) we posit some global number handout algorithm system (maybe useful, 
but non-trivial; see multicast address assignment problem)

Henning

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