Gabriel and Rafa,

I remember in IETF102 I2NSF session, you agreed to add some description on 
how/where your Option 2 can be used ( i.e. Using Controller to assist the IPsec 
key computation and pass the SA attributes together with its IPsec session key 
to the pair-wise Nodes via a secure management channel), such as

-        for some special secure environment (e.g. in one physically isolated 
data center) or

-        some resource constrained IoT deployment that can tolerance some risks.

It is important to document the risks associated with the option, so that users 
can make the informed decision.


Thanks, Linda Dunbar

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