not-routable prefix for CBIDs

[Francis Dupont <Francis.Dupont at enst-bretagne.fr>]

As it seems we won't have enough time I explain here my idea about
a not-routable prefix for CBIDs:
 - there are some uses of cryptographically generated identifiers
   (the details are not important, they can considered as identifiers
    with random bits)
 - these identifiers follow the IPv6 address format, mainly in order
   to be handled by common APIs
 - these identifiers are not addresses so should be very easy to be
   recognized as they are, for instance they are not-routable
 - IMHO the best is to give them a dedicated prefix in the IPv6
   address space
 - the only real constraint is the length of the prefix: IANA advice
   is 16 bit length
 - so my question is how to procedd, possible concerns, etc.

Regards

Francis.Dupont at enst-bretagne.fr

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