CGA integration into IPsec/IKEv2 authentication

In IPv6 networks, two security mechanisms are available at the network-layer; SEcure Neighbor Discovery (SEND) and IP security (IPsec). Although both provide authentication, neither subsumes the other; both SEND and IPsec mechanisms should be deployed together to protect IPv6 networks. However, when a node uses both SEND and IPsec, the authentication has to be done twice, which increases the burden on the node and decreases its performance. In this paper, we propose an approach to enable them to work together under the mediation of an Authentication Management Block, where IPsec uses the public-private keys obtained by SEND rather than negotiating its own authentication credentials in order to save the time and facilitate the IPsec authentication deployment. We implement and evaluate our approach using ipsec-tools and DoCoMo SEND implementations. Our proof-of-concept experiment shows a considerable speedup of IPsec authentication time.