Anonymity profile for DHCP clients
draft-ietf-dhc-anonymity-profile-06

The information below is for an old version of the document
Document Type Active Internet-Draft (dhc WG)
Last updated 2016-02-15 (latest revision 2016-01-29)
Replaces draft-huitema-dhc-anonymity-profile
Stream IETF
Intended RFC status Proposed Standard
Formats pdf htmlized bibtex
Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Bernie Volz
Shepherd write-up Show (last changed 2016-01-13)
IESG IESG state Waiting for Writeup
Consensus Boilerplate Unknown
Telechat date
Responsible AD Brian Haberman
Send notices to (None)
IANA IANA review state IANA OK - No Actions Needed
Network Working Group                                         C. Huitema
Internet-Draft                                                 Microsoft
Intended status: Standards Track                            T. Mrugalski
Expires: August 1, 2016                                              ISC
                                                             S. Krishnan
                                                                Ericsson
                                                        January 29, 2016

                   Anonymity profile for DHCP clients
                draft-ietf-dhc-anonymity-profile-06.txt

Abstract

   Some DHCP options carry unique identifiers.  These identifiers can
   enable device tracking even if the device administrator takes care of
   randomizing other potential identifications like link-layer addresses
   or IPv6 addresses.  The anonymity profile is designed for clients
   that wish to remain anonymous to the visited network.  The profile
   provides guidelines on the composition of DHCP or DHCPv6 requests,
   designed to minimize disclosure of identifying information.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 1, 2016.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Huitema, et al.          Expires August 1, 2016                 [Page 1]
Internet-Draft           DHCP Anonymity Profile             January 2016

   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements  . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Application domain  . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  MAC address Randomization hypotheses  . . . . . . . . . .   4
     2.2.  MAC address Randomization and DHCP  . . . . . . . . . . .   5
     2.3.  Radio fingerprinting  . . . . . . . . . . . . . . . . . .   5
     2.4.  Operating system fingerprinting . . . . . . . . . . . . .   6
     2.5.  No anonymity profile identification . . . . . . . . . . .   6
     2.6.  Using the anonymity profiles  . . . . . . . . . . . . . .   7
     2.7.  What about privacy for DHCP servers . . . . . . . . . . .   8
   3.  Anonymity profile for DHCPv4  . . . . . . . . . . . . . . . .   8
     3.1.  Avoiding fingerprinting . . . . . . . . . . . . . . . . .   9
     3.2.  Client IP address field . . . . . . . . . . . . . . . . .   9
     3.3.  Requested IP address option . . . . . . . . . . . . . . .  10
     3.4.  Client hardware address field . . . . . . . . . . . . . .  11
     3.5.  Client Identifier Option  . . . . . . . . . . . . . . . .  11
     3.6.  Parameter Request List Option . . . . . . . . . . . . . .  12
     3.7.  Host Name Option  . . . . . . . . . . . . . . . . . . . .  12
     3.8.  Client FQDN Option  . . . . . . . . . . . . . . . . . . .  13
     3.9.  UUID/GUID-based Client Identifier Option  . . . . . . . .  14
     3.10. User and Vendor Class DHCP options  . . . . . . . . . . .  14
   4.  Anonymity profile for DHCPv6  . . . . . . . . . . . . . . . .  14
     4.1.  Avoiding fingerprinting . . . . . . . . . . . . . . . . .  15
     4.2.  Do not send Confirm messages, unless really sure where  .  15
     4.3.  Client Identifier DHCPv6 Option . . . . . . . . . . . . .  16
       4.3.1.  Anonymous Information-Request . . . . . . . . . . . .  16
     4.4.  Server Identifier Option  . . . . . . . . . . . . . . . .  17
     4.5.  Address assignment options  . . . . . . . . . . . . . . .  17
       4.5.1.  Obtain temporary addresses  . . . . . . . . . . . . .  18
       4.5.2.  Prefix delegation . . . . . . . . . . . . . . . . . .  18
Show full document text