Requirements for DTLS 1.3 in Constrained IoT Devices
draft-yang-uta-dtls13-for-iot-00

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UTA                                                              B. Yang
Internet-Draft                                              China Mobile
Intended status: Informational                          October 19, 2018
Expires: April 22, 2019

          Requirements for DTLS 1.3 in Constrained IoT Devices
                    draft-yang-uta-dtls13-for-iot-00

Abstract

   The purpose of this document is to summarize several typical
   terminals and service types in using DTLS 1.3 for constrained IoT
   devices, especially those of cellular networks, analyses the existing
   problems on TLS/DTLS solution on constrained devices and provides
   some suggestions are given.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on April 22, 2019.

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Yang                     Expires April 22, 2019                 [Page 1]
Internet-Draft              DTLS 1.3 for IoT                October 2018

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   2
   3.  IoT Services Scenarios and Devices  . . . . . . . . . . . . .   3
   4.  Suggestions and Considerations  . . . . . . . . . . . . . . .   4
     4.1.  Shorten Message Size of Handshaking . . . . . . . . . . .   4
     4.2.  Problems Introduced by NAT  . . . . . . . . . . . . . . .   4
     4.3.  Long-time Dormancy Devices  . . . . . . . . . . . . . . .   5
   5.  Normative References  . . . . . . . . . . . . . . . . . . . .   5
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   There are many kinds of IoT devices, thus many classification methods
   accrodingly.  From the communication throughput aspect, IoT devices
   can be divided into low-speed, high-speed devices.  From the
   geographical location aspects, they can be divided into: mobile
   devices, fixed devices.  From the processing capacity, they can be
   divided into simple mobile devices, smart mobile devices.

   IoT Services can be divided into personal application, family
   application, vertical industry application according to different
   usage situations.

   Different types of devices and services have different communication
   and service characteristics, but in general, saving resources and
   communication security are common requirements.

   [RFC 7925] introduced the IoT profiles in using TLS/DTLS 1.2.  [RFC
   8446] introduced a new and clean TLS 1.3. [draft-tschofenig-uta-
   tls13-profile-01] offered communication security services for IoT
   applications and is reasonably implementable on many constrained
   devices.

   This document summarizes several terminal and service types in using
   DTLS 1.3 for constrained IoT devices, especially those of cellular
   networks, analyses the existing problems on TLS/DTLS solution on
   constrained devices and provides some suggestions are given.

2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

Yang                     Expires April 22, 2019                 [Page 2]
Internet-Draft              DTLS 1.3 for IoT                October 2018

3.  IoT Services Scenarios and Devices

   In different scenarios, IoT services show different characteristics,
   and their device and security requirements are considerably
   different.  This section lists several typical IoT usage scenarios to
   analyze its device features and security requirements.

   o  Low mobility, low traffic applications: these devices mainly rely
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