Bundle Protocol Security Specification
draft-ietf-dtn-bpsec-08

Document Type Active Internet-Draft (dtn WG)
Last updated 2018-10-22
Replaces draft-birrane-dtn-sbsp
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Send notices to Scott Burleigh <Scott.C.Burleigh@jpl.nasa.gov>
Delay-Tolerant Networking                                     E. Birrane
Internet-Draft                                               K. McKeever
Intended status: Standards Track                                 JHU/APL
Expires: April 25, 2019                                 October 22, 2018

                 Bundle Protocol Security Specification
                        draft-ietf-dtn-bpsec-08

Abstract

   This document defines a security protocol providing end to end 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
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   This Internet-Draft will expire on April 25, 2019.

Copyright Notice

   Copyright (c) 2018 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
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Birrane & McKeever       Expires April 25, 2019                 [Page 1]
Internet-Draft   Bundle Protocol Security Specification     October 2018

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 . . . . . . . . . . . . . . . .   7
     2.3.  Mixed Security Policy . . . . . . . . . . . . . . . . . .   8
     2.4.  User-Selected Cipher Suites . . . . . . . . . . . . . . .   8
     2.5.  Deterministic Processing  . . . . . . . . . . . . . . . .   9
   3.  Security Blocks . . . . . . . . . . . . . . . . . . . . . . .   9
     3.1.  Block Definitions . . . . . . . . . . . . . . . . . . . .   9
     3.2.  Uniqueness  . . . . . . . . . . . . . . . . . . . . . . .  10
     3.3.  Target Multiplicity . . . . . . . . . . . . . . . . . . .  10
     3.4.  Target Identification . . . . . . . . . . . . . . . . . .  11
     3.5.  Block Representation  . . . . . . . . . . . . . . . . . .  11
     3.6.  Security Association Block  . . . . . . . . . . . . . . .  12
     3.7.  Abstract Security Block . . . . . . . . . . . . . . . . .  14
     3.8.  Block Integrity Block . . . . . . . . . . . . . . . . . .  17
     3.9.  Block Confidentiality Block . . . . . . . . . . . . . . .  18
     3.10. Block Interactions  . . . . . . . . . . . . . . . . . . .  19
     3.11. SA Parameters and Result Identification . . . . . . . . .  20
     3.12. BSP Block Examples  . . . . . . . . . . . . . . . . . . .  21
       3.12.1.  Example 1: Constructing a Bundle with Security . . .  21
       3.12.2.  Example 2: Adding More Security At A New Node  . . .  22
   4.  Canonical Forms . . . . . . . . . . . . . . . . . . . . . . .  24
   5.  Security Processing . . . . . . . . . . . . . . . . . . . . .  24
     5.1.  Bundles Received from Other Nodes . . . . . . . . . . . .  25
       5.1.1.  Receiving BCBs  . . . . . . . . . . . . . . . . . . .  25
       5.1.2.  Receiving BIBs  . . . . . . . . . . . . . . . . . . .  26
     5.2.  Bundle Fragmentation and Reassembly . . . . . . . . . . .  27
   6.  Key Management  . . . . . . . . . . . . . . . . . . . . . . .  27
   7.  Security Policy Considerations  . . . . . . . . . . . . . . .  27
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  29
     8.1.  Attacker Capabilities and Objectives  . . . . . . . . . .  29
     8.2.  Attacker Behaviors and BPSec Mitigations  . . . . . . . .  30
       8.2.1.  Eavesdropping Attacks . . . . . . . . . . . . . . . .  30
       8.2.2.  Modification Attacks  . . . . . . . . . . . . . . . .  31
       8.2.3.  Topology Attacks  . . . . . . . . . . . . . . . . . .  32
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