UAS Operator Privacy for RemoteID Messages
draft-moskowitz-drip-operator-privacy-03

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DRIP                                                        R. Moskowitz
Internet-Draft                                            HTT Consulting
Intended status: Standards Track                                 S. Card
Expires: 9 November 2020                                 A. Wiethuechter
                                                           AX Enterprize
                                                              8 May 2020

               UAS Operator Privacy for RemoteID Messages
                draft-moskowitz-drip-operator-privacy-03

Abstract

   This document describes a method of providing privacy for UAS
   Operator/Pilot information specified in the ASTM UAS Remote ID and
   Tracking messages.  This is achieved by encrypting, in place, those
   fields containing Operator sensitive data using a hybrid ECIES.

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Moskowitz, et al.        Expires 9 November 2020                [Page 1]
Internet-Draft              Operator Privacy                    May 2020

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terms and Definitions . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Requirements Terminology  . . . . . . . . . . . . . . . .   3
     2.2.  Definitions . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  The Operator - USS Security Relationship  . . . . . . . . . .   5
   4.  System Message Privacy  . . . . . . . . . . . . . . . . . . .   5
     4.1.  Rules for encrypting System Message content . . . . . . .   5
     4.2.  Rules for decrypting System Message content . . . . . . .   6
   5.  Operator ID Message Privacy . . . . . . . . . . . . . . . . .   6
     5.1.  Rules for encrypting Operator ID Message content  . . . .   7
     5.2.  Rules for decrypting Operator ID Message content  . . . .   7
   6.  Cipher choices for Operator PII encryption  . . . . . . . . .   7
     6.1.  Using AES-CFB16 . . . . . . . . . . . . . . . . . . . . .   7
     6.2.  Using a Feistel scheme  . . . . . . . . . . . . . . . . .   8
     6.3.  Using AES-CTR . . . . . . . . . . . . . . . . . . . . . .   8
   7.  DRIP Requirements addressed . . . . . . . . . . . . . . . . .   8
   8.  ASTM Considerations . . . . . . . . . . . . . . . . . . . . .   8
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   10. Security Considerations . . . . . . . . . . . . . . . . . . .   9
     10.1.  CFB16 Risks  . . . . . . . . . . . . . . . . . . . . . .   9
     10.2.  Crypto Agility . . . . . . . . . . . . . . . . . . . . .   9
   11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   9
   12. Normative References  . . . . . . . . . . . . . . . . . . . .   9
   13. Informative References  . . . . . . . . . . . . . . . . . . .  10
   Appendix A.  Feistel Scheme . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   This document defines a mechanism to provide privacy in the ASTM
   Remote ID and Tracking messages [F3411-19] by encrypting, in place,
   those fields that contain sensitive UAS Operator/Pilot information.
   Encrypting in place means that the ciphertext is exactly the same
   length as the cleartext, and directly replaces it.

   An example of and an initial application of this mechanism is the 8
   bytes of UAS Operator/Pilot (hereafter called simply Operator)
   longitude and latitude location in the System Message.  This meets
   the Drip Requirements [drip-requirements], Priv-01.

   It is assumed that the Operator registers a mission with a USS.
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