A method of validated communication

摘要

The present invention provides a method of validated communication between a mobile network node (MNN) and a correspondent node (CN) via at least a first mobile router (MR). The method is characterised by employing an extended return routability checking procedure (XRRP) wherein an MNN test initiation (MNNTI) message is sent by the MR, and a MNN test (MNNT) message is sent by the CN. This adds to the security of requiring the home and care-of addresses being consistent as noted previously in standard RRPs, by enabling the generation of binding update validation keys based on receipt on any or all of the three HoT, CoT and MNNT test messages. The method is further characterised by sending from the MR an extended binding update (XBU), comprising the MNN's address (MNNA). By extending the binding update to include the MNNA in this manner, validated CN / MNN route optimisation can be achieved.