Bundle Protocol Security Specification
draft-ietf-dtn-bpsec-27

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Delay-Tolerant Networking                                     E. Birrane
Internet-Draft                                               K. McKeever
Intended status: Standards Track                                 JHU/APL
Expires: August 19, 2021                               February 15, 2021

                 Bundle Protocol Security Specification
                        draft-ietf-dtn-bpsec-27

Abstract

   This document defines a security protocol providing data integrity
   and confidentiality services for the Bundle Protocol.

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 https://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
   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 August 19, 2021.

Copyright Notice

   Copyright (c) 2021 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
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Birrane & McKeever       Expires August 19, 2021                [Page 1]
Internet-Draft   Bundle Protocol Security Specification    February 2021

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Supported Security Services . . . . . . . . . . . . . . .   3
     1.2.  Specification Scope . . . . . . . . . . . . . . . . . . .   4
     1.3.  Related Documents . . . . . . . . . . . . . . . . . . . .   5
     1.4.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   6
   2.  Design Decisions  . . . . . . . . . . . . . . . . . . . . . .   7
     2.1.  Block-Level Granularity . . . . . . . . . . . . . . . . .   7
     2.2.  Multiple Security Sources . . . . . . . . . . . . . . . .   8
     2.3.  Mixed Security Policy . . . . . . . . . . . . . . . . . .   9
     2.4.  User-Defined Security Contexts  . . . . . . . . . . . . .   9
     2.5.  Deterministic Processing  . . . . . . . . . . . . . . . .   9
   3.  Security Blocks . . . . . . . . . . . . . . . . . . . . . . .  10
     3.1.  Block Definitions . . . . . . . . . . . . . . . . . . . .  10
     3.2.  Uniqueness  . . . . . . . . . . . . . . . . . . . . . . .  10
     3.3.  Target Multiplicity . . . . . . . . . . . . . . . . . . .  12
     3.4.  Target Identification . . . . . . . . . . . . . . . . . .  13
     3.5.  Block Representation  . . . . . . . . . . . . . . . . . .  13
     3.6.  Abstract Security Block . . . . . . . . . . . . . . . . .  13
     3.7.  Block Integrity Block . . . . . . . . . . . . . . . . . .  16
     3.8.  Block Confidentiality Block . . . . . . . . . . . . . . .  17
     3.9.  Block Interactions  . . . . . . . . . . . . . . . . . . .  18
     3.10. Parameter and Result Identification . . . . . . . . . . .  19
     3.11. BSP Block Examples  . . . . . . . . . . . . . . . . . . .  20
       3.11.1.  Example 1: Constructing a Bundle with Security . . .  20
       3.11.2.  Example 2: Adding More Security At A New Node  . . .  21
   4.  Canonical Forms . . . . . . . . . . . . . . . . . . . . . . .  23
   5.  Security Processing . . . . . . . . . . . . . . . . . . . . .  24
     5.1.  Bundles Received from Other Nodes . . . . . . . . . . . .  24
       5.1.1.  Receiving BCBs  . . . . . . . . . . . . . . . . . . .  24
       5.1.2.  Receiving BIBs  . . . . . . . . . . . . . . . . . . .  25
     5.2.  Bundle Fragmentation and Reassembly . . . . . . . . . . .  26
   6.  Key Management  . . . . . . . . . . . . . . . . . . . . . . .  27
   7.  Security Policy Considerations  . . . . . . . . . . . . . . .  27
     7.1.  Security Reason Codes . . . . . . . . . . . . . . . . . .  28
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  30
     8.1.  Attacker Capabilities and Objectives  . . . . . . . . . .  30
     8.2.  Attacker Behaviors and BPSec Mitigations  . . . . . . . .  31
       8.2.1.  Eavesdropping Attacks . . . . . . . . . . . . . . . .  31
       8.2.2.  Modification Attacks  . . . . . . . . . . . . . . . .  32
       8.2.3.  Topology Attacks  . . . . . . . . . . . . . . . . . .  33