| 摘要 |
A modified Host Identity Protocol, HIP, base exchange method is provided for use by first and second HIP hosts (Initiator and Responder) having a shared state from a pre-existing relationship. In the modified HIP base exchange method, an authentication message (I 2' ) is sent (S 2 ) from the first host (Initiator) to the second host (Responder) comprising an identifier (HITI) of the first host (Initiator) and a cryptographic item (PF). The authentication message (I 2' ) is received (S 3 ) at the second host (Responder). Following receipt, the identifier and information relating to the shared state are used (S 4 ) to authenticate the cryptographic item (PF). If the cryptographic item, and the rest of the authentication message, is authenticated, a confirmation message (R 2' ) is sent from the second host (Responder) to the first host (Initiator) to indicate successful authentication. These two messages (I 2' and R 2' ) are equivalent to the I 2 and R 2 messages of the standard HIP base exchange protocol, and the requirement for the I 1 and R 1 messages from the standard HIP base exchange protocol is eliminated.
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