Mobile IP and security issue: an overview

Mobile IP enables a wireless network node to move freely from one point of connection to the Internet to another point, without causing disruption of established TCP end-to-end connectivity. Our model for extending Mobile IP relies on the existence of servers that are capable of performing accounting, authentication, and authorization (AAA) services. The model is known to be reasonable, because many dial-up services in the Internet today already rely on an AAA service called RADIUS. We capitalize on the experience of others in today's Internet to combine Mobile IP with AAA services to provide the kind of mobility infrastructure that meets the emerging needs of cellular telephones for mobile data, and eventually Voice over IP, services to a large population of mobile telephone users. Mobile IP will increase the deployment of wireless data applications. Using the AAA extensions will create a much easier path towards ubiquitous availability of wireless service across the domain boundaries of the operators for many different wireless access services.