Patent ID: 7626963

Claim:
In a Mobile Node supporting Mobile IP, a method of registering with a Home Agent supporting Mobile IP, comprising: sending a bootstrap request to the Home Agent to initiate generation of at least one Mobile IP key from the authentication information associated with an International Mobile Subscriber Identity; receiving a bootstrap reply including one or more random numbers from the Home Agent; generating the at least one Mobile IP key from the authentication information associated with the International Mobile Subscriber Identity and the random numbers received in the bootstrap reply, wherein generating the at least one Mobile IP key from the authentication information associated with the International Mobile Subscriber Identity and the random number received in the bootstrap reply includes generating a MN-AAA key shared between the Mobile Node and a AAA server; generating a registration request including the MN-AAA key; generating a MN-HA key from the MN-AAA key to authenticate a registration reply including a MHAE; and authenticating the MHAE using the MN-HA key.