Patent ID: 7298847
Filing Date: 2007-11-20
Classification: H04L,H04W

Abstract:
1. A system for a secure key distribution protocol in AAA for Mobile IP, comprising: an MN that is configured to: generate a Reg-Req message that includes Diffie-Hellman parameters that are used to generate session keys and produce signatures; initiate an authentication session by sending the Reg-Req message; receive a Reg-Reply message that includes session keys that may be used to directly communicate with the AAAH, AAAF, HA, and FA nodes while the MN is in a foreign authority, wherein the session keys are encrypted and wherein the session keys include a first at least one key, a second at least one key, and a third at least one key; an FA that is configured to: receive the Reg-Req message; ensure that the authentication session is valid; and when valid, sign and send the Reg-Req message; otherwise, end the authentication session; receive, and authenticate the Reg-Reply message, decrypt at least one key of the session keys; sign, and send the Reg-Reply message to the MN; an AAAF that is configured to: receive and authenticate the Reg-Req message; generate a first at least one key of the session keys using the Diffie-Hellman algorithm and the Diffie-Heilman parameters; add an identifier relating to the Reg-Req message; sign and send the Reg-Req message; receive, authenticate, sign and send the Reg-Reply message to the FA; an AAAH that is configured to: receive and authenticate the Reg-Req message; generate a second at least one key of the session keys; sign and send the Reg-Req message including the second at least one key; receive and authenticate the Reg-Reply message; generate a third at least one key of the session keys; encrypt the session keys; sign and send the Reg-Reply message including the third at least one key to the AAAF and an HA that is configured to: receive the Reg-Req message including the second at least one key; prepare a Reg-Reply message in response to the Reg-Req message; and send the Reg-Reply message to the AAAH.