Patent ID: 7881468
Filing Date: 2011-02-01
Classification: H04L,H04W

Abstract:
1. A method for exchanging a Secret Authentication Key (SK bm ) between a Mobile node (MN) and a Correspondent Node (CN) within a Internet Protocol version 6 (IPv6) network, wherein the MN has a pair of asymmetric keys comprising a private key (K−) and a public key (K+) and wherein the MN has a first IPv6 address (HoA) valid in a home portion of the IPv6 network, the method comprising steps of: upon displacement of the MN from the home portion of the IPv6 network to a visited portion of the IPv6 network, setting a second IPv6 address (CoA) valid in the visited portion of the IPv6 network, the CoA being set in addition to the HoA; sending an establishment message from the MN addressed to the CN through a Home Agent (HA) associated to the MN, wherein the establishment message advertises the CoA and wherein the HA is located in the home portion of the Mobile IPv6; upon reception of the establishment message at the CN: upon reception of the first address test and the second address test at the MN, sending the secret data back to the CN in a single confirmation message, wherein the confirmation message is signed by the MN using the K−; and upon reception of the confirmation message at the CN, sending an acknowledgement message to the MN addressed to the CoA, wherein the acknowledgement message comprises the SK