Using Identity as Raw Public Key in Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS)
draft-wang-tls-raw-public-key-with-ibc-01

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Internet Engineering Task Force                             H. Wang, Ed.
Internet-Draft                                                   Y. Yang
Intended status: Standards Track                                 X. Kang
Expires: December 29, 2018                   Huawei Technology Pte. Ltd.
                                                           June 27, 2018

 Using Identity as Raw Public Key in Transport Layer Security (TLS) and
                Datagram Transport Layer Security (DTLS)
               draft-wang-tls-raw-public-key-with-ibc-01

Abstract

   This document specifies the use of identity as a raw public key in
   Transport Layer Security (TLS) and Datagram Transport Layer Security
   (DTLS).  The TLS protocol procedures are kept unchanged, but cipher
   suites are extended to support Identity-based signature (IBS).  The
   example OID tables in the RFC 7250 [RFC7250] are expanded with OIDs
   specific to IBS algorithms.

Status of This Memo

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   This Internet-Draft will expire on December 29, 2018.

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   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Wang, et al.            Expires December 29, 2018               [Page 1]
Internet-Draft           TLS-RAW-Public-Key-IBC                June 2018

   include Simplified BSD License text as described in Section 4.e of
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Extension of RAW Public Key to IBC-based Identity . . . . . .   4
   4.  New Key Exchange Algorithms and Cipher Suites . . . . . . . .   6
   5.  TLS Client and Server Handshake Behavior  . . . . . . . . . .   7
   6.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .  10
     6.1.  TLS Client and Server Use IBS algorithm . . . . . . . . .  10
     6.2.  Combined Usage of Raw Public Keys and X.509 Certificates   11
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  13
     10.2.  Informative References . . . . . . . . . . . . . . . . .  13
   Appendix A.  Examples . . . . . . . . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   DISCLAIMER: This is a personal draft and has not yet seen significant
   security analysis.

   Traditionally, TLS client and server exchange public keys endorsed by
   PKIX [PKIX] certificates.  It is considered complicated and may cause
   security weaknesses with the use of PKIX certificates Defeating-SSL
   [Defeating-SSL].  To simplify certificates exchange, using RAW public
   key with TLS/DTLS has been spcified in RFC 7250.  That is, instead of
   transmitting a full certificate or a certificate chain in the TLS
   messages, only public keys are exchanged between client and server.
   However, using RAW public key requires out-of-band mechanisms to bind
   the public key to the entity presenting the key.

   Recently, 3GPP has adopted the EAP authentication framework for 5G
   and EAP-TLS is considered as one of the candidate authentication
   methods for private networks, especially for networks with a large
   number of IOT devices.  For IOT networks, TLS/DTLS with RAW public
   key is particularly attractive, but binding identities with public
   keys might be challenging.  The cost to maintain a large table for
   identity and public key mapping at server side incurs additional
   maintenance cost.  e.g. devices have to pre-register to the server.
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