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Correspondent Binding Update BU message IPv6 header source = CoA destination = CN Destination option pHoA Mobility header Seq# home nonce index care-of nonce index Enc(Kbm, iHoA) First (96, HMAC_SHA1 (Kbm, (care-of address | correspondent | BU))) where Kbm = SHA1 (home keygen token | care-of keygen token) ; no change home keygen token = First (64, HMAC_SHA1(Kcn, (pHoA | nonce | 0))) care-of keygen token = First (64, HMAC_SHA1(Kcn, (CoA | nonce | 1))); no change The identity address iHoA could be the real HoA or the first pHoA when established the session. |