Privacy in IPv6 Network Prefix Assignment
draft-herbert-ipv6-prefix-address-privacy-00

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INTERNET-DRAFT                                                T. Herbert
Intended Status: Informational                                Quantonium
Expires: August 2018                                                    
                                                                        
                                                                        
                                                       February 20, 2018

               Privacy in IPv6 Network Prefix Assignment
              draft-herbert-ipv6-prefix-address-privacy-00

Abstract

   This document discusses privacy concerns around network prefix
   assignment in IPv6. It evaluates the privacy threat, proposes a set
   of ideal criteria for strong privacy, and suggests solutions to
   achieve a high degree of privacy in addressing.

Status of this Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
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Copyright and License Notice

   Copyright (c) 2018 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
 

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INTERNET DRAFTdraft-herbert-ipv6-prefix-address-privacy-00February 20, 2018

   (http://trustee.ietf.org/license-info) in effect on the date of
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Table of Contents

   1  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2  The privacy concern . . . . . . . . . . . . . . . . . . . . . .  3
   3  Prior work  . . . . . . . . . . . . . . . . . . . . . . . . . .  4
     3.1 SLAAC and DHCPv6-PD  . . . . . . . . . . . . . . . . . . . .  4
     3.2 Privacy addresses  . . . . . . . . . . . . . . . . . . . . .  4
     3.3 Privacy in IPv6 address generation mechanisms  . . . . . . .  5
     3.4 Host address availability recommendations  . . . . . . . . .  6
     3.5 IPWAVE . . . . . . . . . . . . . . . . . . . . . . . . . . .  6
   4  Practical effects . . . . . . . . . . . . . . . . . . . . . . .  7
     4.1  Mobile networks . . . . . . . . . . . . . . . . . . . . . .  7
     4.2  Connected cars  . . . . . . . . . . . . . . . . . . . . . .  7
     4.3  Privacy implications of NAT . . . . . . . . . . . . . . . .  8
     4.4  Exploit to defeat prefix rotation . . . . . . . . . . . . .  8
   5  Criteria for strong privacy . . . . . . . . . . . . . . . . . .  9
   6  Identifier/locator split solution . . . . . . . . . . . . . . . 10
     6.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     6.2 Scaling identifier/locator address assignment  . . . . . . . 11
       6.2.1 Scaling the amount of mapping state  . . . . . . . . . . 11
         6.2.1.1 Hybrid address assignment  . . . . . . . . . . . . . 11
         6.2.1.2 Hidden aggregation . . . . . . . . . . . . . . . . . 11
       6.2.2 Scaling bulk address assignment  . . . . . . . . . . . . 12
         6.2.2.1 Bulk assignment using DHCPv6 . . . . . . . . . . . . 12
         6.2.2.2 Hidden aggregation assignment  . . . . . . . . . . . 13
       6.2.3 Practicality of hidden aggregation methods . . . . . . . 13
     6.3 Law enforcement considerations . . . . . . . . . . . . . . . 14
   7  Security considerations . . . . . . . . . . . . . . . . . . . . 15
   8  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 16
     8.1  Normative References  . . . . . . . . . . . . . . . . . . . 16
     8.2  Informative References  . . . . . . . . . . . . . . . . . . 16
   9  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 17
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 17

 

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