Abstract
This paper proposes solutions for the trusted connection between mobile nodes and mobility anchor points in Hierarchical Mobile IPv6. Two operation modes are supported for different scenarios: The first one is authentication-only mode for the scenario that the mobility anchor point only needs to ensure any binding update messages are from the claimed mobile nodes. The second one is authentication and authorization mode for the scenario that the mobility anchor point and mobile node need to authenticate each other and the mobility anchor point also needs to know if the mobile node is authorized for using it.