>Right, I see. Are you familiar with the HMAC extension to babel
>(RFC7298)? That does something different (it prevents nodes that don't
>know the shared secret from participating in the network at all, but
>does not restrict which prefixes each node can export). However, it may
>be useful to read at least parts of it to help you formulate the
>requirements for your own scheme.
RFC 4593 is a good starting point.
--
Denis Ovsienko
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