IP%20Address%20Location%20Privacy%20and%20Mobile%20IPv6:%20Problem%20Statement

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IP Address Location Privacy and Mobile IPv6
Problem Statement

• draft-irtf-mobopts-location-privacy-PS-00.txt
• Rajeev Koodli

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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

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Background (MIP6)

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

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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)

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Issues to address

• Support for route optimization
• Signaling overhead considerations for Mobile
  IPv6, including Return Routability and IPsec
• Static or dynamic HoA allocation

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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.