A method, apparatus, and computer program product are provided for adapting security level between a mobile node and a mobility anchor. In the context of a method, an IP mobility binding with an indication of a security mode is established for a mobile node connected to an IP sub-network and identified in the IP sub-network by a care of address. A trigger to adapt the security mode for the mobile node connected to the IP sub-network is detected. The security mode for the mobile mode connected to the IP sub-network and identified by the care of address is adapted in response to the trigger.