The Impact of Transport Header Confidentiality on Network Operation and Evolution of the Internet
draft-fairhurst-tsvwg-transport-encrypt-10

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TSVWG                                                       G. Fairhurst
Internet-Draft                                    University of Aberdeen
Intended status: Informational                                C. Perkins
Expires: February 28, 2019                         University of Glasgow
                                                         August 27, 2018

The Impact of Transport Header Confidentiality on Network Operation and
                       Evolution of the Internet
               draft-fairhurst-tsvwg-transport-encrypt-10

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 February 28, 2019.

Copyright Notice

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

Fairhurst & Perkins     Expires February 28, 2019               [Page 1]
Internet-Draft            Transport Encryption               August 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Context and Rationale . . . . . . . . . . . . . . . . . . . .   3
   3.  Current uses of Transport Headers within the Network  . . . .   9
     3.1.  Observing Transport Information in the Network  . . . . .   9
     3.2.  Transport Measurement . . . . . . . . . . . . . . . . . .  15
     3.3.  Use for Network Diagnostics and Troubleshooting . . . . .  18
     3.4.  Observing Headers to Implement Network Policy . . . . . .  19
   4.  Encryption and Authentication of Transport Headers  . . . . .  19
     4.1.  Authenticating the Transport Protocol Header  . . . . . .  21
     4.2.  Encrypting the Transport Payload  . . . . . . . . . . . .  22
     4.3.  Encrypting the Transport Header . . . . . . . . . . . . .  22
     4.4.  Authenticating Transport Information and Selectively
           Encrypting the Transport Header . . . . . . . . . . . . .  22
     4.5.  Optional Encryption of Header Information . . . . . . . .  23
   5.  Addition of Transport Information to Network-Layer Protocol
       Headers . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
   6.  Implications of Protecting the Transport Headers  . . . . . .  24
     6.1.  Independent Measurement . . . . . . . . . . . . . . . . .  24
     6.2.  Characterising "Unknown" Network Traffic  . . . . . . . .  25
     6.3.  Accountability and Internet Transport Protocols . . . . .  25
     6.4.  Impact on Research, Development and Deployment  . . . . .  26
   7.  Conclusions . . . . . . . . . . . . . . . . . . . . . . . . .  27
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  29
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  31
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  31
   11. Informative References  . . . . . . . . . . . . . . . . . . .  31
   Appendix A.  Revision information . . . . . . . . . . . . . . . .  37
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  37

1.  Introduction

   This document describes implications of applying end-to-end
   encryption at the transport layer.  It reviews the implications of
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