[dhcwg] Two approaches to DHCP privacy

Christian Huitema <huitema@microsoft.com> Tue, 10 March 2015 21:22 UTC

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From: Christian Huitema <huitema@microsoft.com>
To: "dhcwg@ietf.org" <dhcwg@ietf.org>
Thread-Topic: Two approaches to DHCP privacy
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Date: Tue, 10 Mar 2015 21:22:39 +0000
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Subject: [dhcwg] Two approaches to DHCP privacy
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We know have two drafts addressing DHCP privacy: http://www.ietf.org/internet-drafts/draft-yiu-dhc-dhcpv6-sa-00.txt and http://www.ietf.org/internet-drafts/draft-huitema-dhc-anonymity-profile-01.txt.

Just in case there is confusion, I want to point out that these two drafts are addressing different scenarios. 

The "dhcpv6-sa" draft proposes establishing a secure association between client and DHCPv6 server; use of encryption prevents leakage of information to third parties, and thus mitigates the corresponding privacy issues. Of course, the secure association provides full access to the information to both client and server. The secure association solution addresses the scenario when the client trusts the server.

My "anonymity" draft addresses a different scenario, when the client is visiting an untrusted network and does not want to provide identifying data to anyone on that network, including to the server. The solution there is to "randomize" most of the data provided to the server, so it could not be used to track the client.

Two different scenarios, two solutions.

-- Christian Huitema