The Impact of Transport Header Confidentiality on Network Operation and Evolution of the Internet
draft-fairhurst-tsvwg-transport-encrypt-09

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TSVWG                                                       G. Fairhurst
Internet-Draft                                    University of Aberdeen
Intended status: Informational                              C.S. Perkins
Expires: December 14, 2018                         University of Glasgow
                                                           June 14, 2018

The Impact of Transport Header Confidentiality on Network Operation and
                       Evolution of the Internet
               draft-fairhurst-tsvwg-transport-encrypt-09

Abstract

   This document describes implications of applying end-to-end
   encryption at the transport layer.  It identifies in-network uses of
   transport layer header information.  It then reviews the implications
   of developing end-to-end transport protocols that use authentication
   to protect the integrity of transport information or encryption to
   provide confidentiality of the transport protocol header and expected
   implications of transport protocol design and network operation.
   Since transport measurement and analysis of the impact of network
   characteristics have been important to the design of current
   transport protocols, it also considers the impact on transport and
   application evolution.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on December 14, 2018.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Fairhurst & Perkins    Expires December 14, 2018                [Page 1]
Internet-Draft            Transport Encryption                 June 2018

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   Please review these documents carefully, as they describe your rights
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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2.  Current uses of Transport Headers within the Network . . . . .  8
     2.1.  Observing Transport Information in the Network . . . . . .  9
       2.1.1.  Flow Identification  . . . . . . . . . . . . . . . . .  9
       2.1.2.  Metrics derived from Transport Layer Headers . . . . . 10
       2.1.3.  Metrics derived from Network Layer Headers . . . . . . 13
     2.2.  Transport Measurement  . . . . . . . . . . . . . . . . . . 14
       2.2.1.  Point of Measurement . . . . . . . . . . . . . . . . . 15
       2.2.2.  Use by Operators to Plan and Provision Networks  . . . 15
       2.2.3.  Service Performance Measurement  . . . . . . . . . . . 16
       2.2.4.  Measuring Transport to Support Network Operations  . . 16
     2.3.  Use for Network Diagnostics and Troubleshooting  . . . . . 17
       2.3.1.  Examples of measurements . . . . . . . . . . . . . . . 18
     2.4.  Observing Headers to Implement Network Policy  . . . . . . 19
   3.  Encryption and Authentication of Transport Headers . . . . . . 19
     3.1.  Authenticating the Transport Protocol Header . . . . . . . 21
     3.2.  Encrypting the Transport Payload . . . . . . . . . . . . . 21
     3.3.  Encrypting the Transport Header  . . . . . . . . . . . . . 21
     3.4.  Authenticating Transport Information and Selectively
           Encrypting the Transport Header  . . . . . . . . . . . . . 22
     3.5.  Optional Encryption of Header Information  . . . . . . . . 22
   4.  Addition of Transport Information to Network-Layer Protocol
       Headers  . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
   5.  Implications of Protecting the Transport Headers . . . . . . . 23
     5.1.  Independent Measurement  . . . . . . . . . . . . . . . . . 23
     5.2.  Characterising "Unknown" Network Traffic . . . . . . . . . 24
     5.3.  Accountability and Internet Transport Protocols  . . . . . 25
     5.4.  Impact on Research, Development and Deployment . . . . . . 25
   6.  Conclusions  . . . . . . . . . . . . . . . . . . . . . . . . . 27
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