On 10/12/2008, at 3:07 AM, Heather Schiller wrote:

Stephen Kent wrote:
Steve
P.S. Irrespective of my analysis above, yes, I do prefer a singly- rooted PKI, with IANA as the only TA, but I can live with a set of TAs so long as I can count them on my fingers, and they all are authoritative for the resources in question :-).
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Steve, That's the concern -- what happens if 2 RIR's assert authority to the same resource?


WG chair hat off

And no I'm not Steve either. :-)

There is no protection anywhere in the RPKI to prevent overlap as an intrinsic property of the RPKI in the case where a single issuer may certify the same resource to two different entities simultaneously. Certificates do not generally prevent this situation of overlap.

And in some cases this may be a feature rather than a bug. When you consider the case of a transfer of resources between two entities it may be prudent to certify the new entity with the resources while the old entity is also certified with the resources in order to allow relying parties to synchronise their local cached state of the distributed repository with the new entity's certified resources before the CA revokes the old entity's certificate that included the transferred resources.

As far as I can tell certificates cannot provide any particular "protection in terms of duplication. The protection, and assurance, is reliant on the accuracy and integrity of the processes used by all involved parties in the correct and diligent administration of number resources. I don't see how certificates can provide any intrinsic protection against procedural failures - it is incumbent on the CAs here to be very diligent in their administration of these resources and ensure that their records, and their issued certificates are accurate.

As far as I understand the situation this statement applies irrespective of any particular TA model.


regards,

  Geoff



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