Quick and Dirty Security for GRASP
draft-carpenter-anima-quads-grasp-00

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Network Working Group                                       B. Carpenter
Internet-Draft                                         Univ. of Auckland
Intended status: Informational                          October 16, 2019
Expires: April 18, 2020

                   Quick and Dirty Security for GRASP
                  draft-carpenter-anima-quads-grasp-00

Abstract

   A secure substrate is required by the Generic Autonomic Signaling
   Protocol (GRASP) used by Autonomic Service Agents.  This document
   describes QUADS, a QUick And Dirty Security method using symmetric
   cryptography and preconfigured keys or passwords.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Method  . . . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Implementation Status [RFC Editor: please remove] . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   4
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   4
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   4
   Appendix A.  Change log [RFC Editor: Please remove] . . . . . . .   5
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   As defined in [I-D.ietf-anima-reference-model], the Autonomic Service
   Agent (ASA) is the atomic entity of an autonomic function, and it is
   instantiated on autonomic nodes.  When ASAs communicate with each
   other, they should use the Generic Autonomic Signaling Protocol
   (GRASP) [I-D.ietf-anima-grasp].  It is essential that such
   communication is strongly secured to avoid malicious interference
   with the Autonomic Network Infrastructure (ANI).

   For this reason, GRASP must run over a secure substrate that is
   isolated from regular data plane traffic.  This substrate is known as
   the Autonomic Control Plane (ACP).  A method for constructing an ACP
   at the network layer is described in
   [I-D.ietf-anima-autonomic-control-plane].  Scenarios for link layer
   ACPs are discussed in [I-D.carpenter-anima-l2acp-scenarios].  The
   present document describes a simple method of emulating an ACP
   immediately above the transport layer, known as QUADS (QUick And
   Dirty Security) for GRASP.

2.  Method

   Every GRASP message, whether unicast or multicast, is encrypted
   immediately before transmission, and decrypted immediately after
   reception, using the same symmetric encryption algorithm and domain-
   wide shared keys.  This applies to all unicast and multicast messages
   sent over either UDP or TCP.  Typically encryption will take place
   immediately after a message is encoded as CBOR [RFC7049], and
   decryption will take place immediately before a message is decoded
   from CBOR.

   There is no attempt to specify an automatic algorithm choice or key
   distribution mechanism.  Every instance of GRASP in a given Autonomic

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   Network (AN) must be pre-configured with the choice of encryption
   algorithm and any necessary parameters, and with the same key(s).
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