Hi,
I am just wondering what is the reason for SKEYSEED in IKEv2 is based on only Nounce and DH parameters. In IKEv1 it is calculated differently depending upon preshared keys, signatures or public key encryption. In case of preshared key in IKEv1 by doing so we can protect the identities of both parties from active attack. But this is not possible in IKEv2 ...