Mobility Management Meet e o

mobile users. Similar to the number of free E-mail providers today, a large number of mobility management providers for IP-based communication can be assumed in the future. As the users will not always know these providers and they are not always large well-established companies, this situation can lead to varying or even diminishing trust of users in providers. The trend in the access network infrastructure goes towards an integration of different technologies with IP as a common communication platform and mobility management being CONTEXT OF MULTIPLE VIDS In the following threat analysis it is generally assumed that a user has a single device which has a single interface with one IP address. This is a simplification compared to real-life, in which a user can have several devices with several interfaces. This simplification allows a clearer description of the problems without affecting the principle considerations and results. Moreover, it is assumed that IP addresses are globally routable and do not refer to the device, e.g., they do not have the link layer address encoded as may be done in IPv6. In packet-based communication there are two basic pieces of information necessary: First, each device connected to the network needs an identifier for addressing which is unique in the addressing domain. Each packet carries this identifier.Existing Proposals and a