Changes in the Internet Threat Model
draft-arkko-arch-internet-threat-model-01

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Network Working Group                                           J. Arkko
Internet-Draft                                                  Ericsson
Intended status: Informational                             July 09, 2019
Expires: January 10, 2020

                  Changes in the Internet Threat Model
               draft-arkko-arch-internet-threat-model-01

Abstract

   Communications security has been at the center of many security
   improvements in the Internet.  The goal has been to ensure that
   communications are protected against outside observers and attackers.

   This memo suggests that the existing threat model, while important
   and still valid, is no longer alone sufficient to cater for the
   pressing security issues in the Internet.  For instance, it is also
   necessary to protect systems against endpoints that are compromised,
   malicious, or whose interests simply do not align with the interests
   of the users.  While such protection is difficult, there are some
   measures that can be taken.

   It is particularly important to ensure that as we continue to develop
   Internet technology, non-communications security related threats are
   properly understood.  While the consideration of these issues is
   relatively new in the IETF, this memo provides some initial ideas
   about potential broader threat models to consider when designing
   protocols for the Internet or when trying to defend against pervasive
   monitoring.  Further down the road, updated threat models could
   result in changes in RFC 3552 (guidelines for writing security
   considerations) and RFC 7258 (pervasive monitoring), to include
   proper consideration of non-communications security threats.  It may
   also be necessary to have dedicated guidance on how systems design
   and architecture affects security.

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

Arkko                   Expires January 10, 2020                [Page 1]
Internet-Draft            Internet Threat Model                July 2019

   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 January 10, 2020.

Copyright Notice

   Copyright (c) 2019 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
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Improvements in Communications Security . . . . . . . . . . .   5
   3.  Issues in Security Beyond Communications Security . . . . . .   5
   4.  Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . .   8
     4.1.  The Role of End-to-end  . . . . . . . . . . . . . . . . .   8
     4.2.  Trusted networks  . . . . . . . . . . . . . . . . . . . .  10
       4.2.1.  Even closed networks can have compromised nodes . . .  11
     4.3.  Balancing Threats . . . . . . . . . . . . . . . . . . . .  12
   5.  Guidelines  . . . . . . . . . . . . . . . . . . . . . . . . .  12
   6.  Potential Changes in IETF Analysis of Protocols . . . . . . .  14
     6.1.  Changes in RFC 3552 . . . . . . . . . . . . . . . . . . .  14
     6.2.  Changes in RFC 7258 . . . . . . . . . . . . . . . . . . .  15
     6.3.  System and Architecture Aspects . . . . . . . . . . . . .  15
   7.  Other Work  . . . . . . . . . . . . . . . . . . . . . . . . .  15
   8.  Conclusions . . . . . . . . . . . . . . . . . . . . . . . . .  15
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  16
   10. Informative References  . . . . . . . . . . . . . . . . . . .  16
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  18

1.  Introduction

   Communications security has been at the center of many security
   improvements in the Internet.  The goal has been to ensure that
   communications are protected against outside observers and attackers.
   At the IETF, this approach has been formalized in BCP 72 [RFC3552],
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