>> However, in the case of >> roaming the feature is highly debatable. If a host visits the same >> network multiple times, should it always reuse the same ID, or should >> it get a new identifier each time? It is very easy to argue that >> "different each time" has better privacy properties.
>Agreed. For instance, draft-ietf-6man-stable-privacy-addresses-06.txt is >not a replacement for RFC4941. If you're a roaming node, you probably >want RFC4941 enabled (in addition to having >draft-ietf-6man-stable-privacy-addresses-06.txt enabled). Have you ever considered add a date/time (optional ) parameter in generation of the new RID, for example: RID = F(Prefix, Interface_Index, Network_ID, DAD_Counter,Date/Time, secret_key), thus will result in different IID each different year, each different month, or even different day. Of course, the IID owner can choose to change secret_key to obtain different IID, but with an addition of date/time option, it is more flexible.
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