IP Traffic Flow Security
draft-hopps-ipsecme-iptfs-01

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Last updated 2019-06-05
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Network Working Group                                           C. Hopps
Internet-Draft                                   LabN Consulting, L.L.C.
Intended status: Standards Track                            June 5, 2019
Expires: December 7, 2019

                        IP Traffic Flow Security
                      draft-hopps-ipsecme-iptfs-01

Abstract

   This document describes a mechanism to enhance IPsec traffic flow
   security by adding traffic flow confidentiality to encrypted IP
   encapsulated traffic.  Traffic flow confidentiality is provided by
   obscuring the size and frequency of IP traffic using a fixed-sized,
   constant-send-rate IPsec tunnel.  The solution allows for congestion
   control as well.

Status of This Memo

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   This Internet-Draft will expire on December 7, 2019.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   include Simplified BSD License text as described in Section 4.e of

Hopps                   Expires December 7, 2019                [Page 1]
Internet-Draft          IP Traffic Flow Security               June 2019

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology & Concepts  . . . . . . . . . . . . . . . . .   3
   2.  The IP-TFS Tunnel . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Tunnel Content  . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  IPTFS_PROTOCOL Payload Content  . . . . . . . . . . . . .   4
       2.2.1.  Data Blocks . . . . . . . . . . . . . . . . . . . . .   5
       2.2.2.  No Implicit Padding Required  . . . . . . . . . . . .   6
       2.2.3.  Empty Payload . . . . . . . . . . . . . . . . . . . .   6
       2.2.4.  IP Header Value Mapping . . . . . . . . . . . . . . .   6
     2.3.  Exclusive SA Use  . . . . . . . . . . . . . . . . . . . .   7
     2.4.  Initiating IP-TFS Operation On The SA.  . . . . . . . . .   7
     2.5.  Modes of Operation  . . . . . . . . . . . . . . . . . . .   7
       2.5.1.  Non-Congestion Controlled Mode  . . . . . . . . . . .   7
       2.5.2.  Congestion Controlled Mode  . . . . . . . . . . . . .   8
   3.  Congestion Information  . . . . . . . . . . . . . . . . . . .   9
     3.1.  ECN Support . . . . . . . . . . . . . . . . . . . . . . .  10
   4.  Configuration . . . . . . . . . . . . . . . . . . . . . . . .  10
     4.1.  Bandwidth . . . . . . . . . . . . . . . . . . . . . . . .  10
     4.2.  Fixed Packet Size . . . . . . . . . . . . . . . . . . . .  10
     4.3.  Congestion Control  . . . . . . . . . . . . . . . . . . .  11
   5.  IKEv2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
     5.1.  TFS Type Transform Type . . . . . . . . . . . . . . . . .  11
     5.2.  IPTFS_REQUIREMENTS Status Notification  . . . . . . . . .  11
   6.  Packet and Data Formats . . . . . . . . . . . . . . . . . . .  12
     6.1.  ESP IP-TFS Payload  . . . . . . . . . . . . . . . . . . .  12
       6.1.1.  Non-Congestion Control IPTFS_PROTOCOL Payload Format   12
       6.1.2.  Congestion Control IPTFS_PROTOCOL Payload Format  . .  13
       6.1.3.  Data Blocks . . . . . . . . . . . . . . . . . . . . .  14
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
     7.1.  IPTFS_PROTOCOL Type . . . . . . . . . . . . . . . . . . .  16
     7.2.  IKEv2 Transform Type TFS Type . . . . . . . . . . . . . .  16
     7.3.  TFS Type Transform IDs Registry . . . . . . . . . . . . .  17
     7.4.  IPTFS_REQUIREMENTS Notify Message Status Type . . . . . .  17
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  17
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  17
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  18
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