I kind did not understand the privacy issues of RFC4941 describbed in Appendeix A. To my reading and understanding of RFC4941, RFC4941 specified to use privacy/temporary address defined as: temporary address= subnet Prefix|| Randomized interface identifier Randomized interface identifier=Hash(fixed interface identifier||64 bits random bits)_left64bits;
Compared to the calcualation proposed in draft-ietf-6man-stable-privacy-addresses-03 RID = F(Prefix, Interface_Index, Network_ID, DAD_Counter, secret_key) _ left64bits They have no essential difference considering secret_key may be random bits. I wonder how an attacker can track a host by such randomizide IID? The only privacy problem I can think of in RFC4941, is that, a host may have two addresses at the same time, one public fixed address for server-function,and one temporay address, But if only temp address is used,how can a host be tracked across network?
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