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DHCP Privacy Considerations

DHCP Privacy Considerations. Tomek Mrugalski IETF90, Toronto 2014-07- 23. Problem statement. DHCP is susceptible to surveillance DHCP can be used to track users and devices Users’ mobility patterns may be revealed Users’ personal information may be revealed. Examples.

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DHCP Privacy Considerations

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  1. DHCP Privacy Considerations Tomek Mrugalski IETF90, Toronto 2014-07-23 IETF-90 DHC WG

  2. Problem statement • DHCP is susceptible to surveillance • DHCP can be used to track users and devices • Users’ mobility patterns may be revealed • Users’ personal information may be revealed • ... IETF-90 DHC WG

  3. Examples • When moving to a new location, the client sends Confirm with addresses that reveal previous location • You may be identified by MAC, link-local, DUID, FQDN and many others • Your device can be fingerprinted by options presence, options content, options order, and behavior • IA_TA (temporary addresses) will help, but only a little.(corresponding servers can track me => my DHCP server can track me) IETF-90 DHC WG

  4. Privacy vs security susceptibility tosurveillance anonymity certificates service Amount of information revealed IETF-90 DHC WG

  5. Question #1 Is WG interested in working on DHCP privacy? ON YES IETF-90 DHC WG

  6. Question #2 Is WG interested in working on DHCP privacy? ON YES Do we want to focus on… DHCPv6 only DHCPv4 and DHCPv6 IETF-90 DHC WG

  7. Question #3 Is WG interested in working on DHCP privacy? ON YES Do we want to focus on… DHCPv6 only DHCPv4 and DHCPv6 What should our goal be? Analyse Analyse and change protocol if needed Analyse and decide what to do next IETF-90 DHC WG

  8. Question #4 How much would you like this work to proceed? Not much (honestly I don’t care) A bit (I will discuss and review) A lot (I volunteer for this work) IETF-90 DHC WG

  9. Scope of work • Part of a bigger picture • Much bigger problem than just DHCP • Need to limit the analysis to DHCP aspects only • Problem analysis • Discussion of possible solutions • Review existing drafts and comment on privacy implications IETF-90 DHC WG

  10. Next steps? IETF-90 DHC WG

  11. Further reading IETF-90 DHC WG

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