1. IP Address Location Privacy and Mobile IPv6: Problem Statement draft-irtf-mobopts-location-privacy-PS-00.txt Rajeev Koodli

2. Background The problem presented at IETF 62 (draft-koodli-mip6-location-privacy-00.txt) The Problem Statement draft requested from MobOpts Revised the original draft with feedback from RG

3. Background (MIP6) Mobile IP defines two IP addresses Home Address (HoA) The MN’s fixed identifier Visible in all packets the MN uses whether on its home network or a visited network Care of Address (CoA) The MN’s routable address on a visited network Visible in all packets sent from the visited network

4. The Roaming problem HoA on a visited network reveals device (and possibly user) roaming to an on-looker CoA reveals device (and possibly) user roaming to a correspondent Related Profiling problem: As with any IPv6 address, an HoA or a CoA can be profiled Compromise in location privacy could lead to more targeted profiling (e.g., track movement patterns of a MN)

5. Issues to address Support for route optimization Signaling overhead considerations for Mobile IPv6, including Return Routability and IPsec Static or dynamic HoA allocation

6. ML input “.. tracing the BU messages via the sequence number can also reveal in real time to an eavesdropper the path taken by an unknown mobile node, i.e., by linking the BU messages and consequently the pseudo- IP addresses. However, the ability to follow the movements in real time, combined with some prior infos about one particular target can lead to break the user's anonymity. “