ACME Identifiers and Challenges for VoIP Service Providers
draft-barnes-acme-service-provider-00

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Network Working Group                                          M. Barnes
Internet-Draft                               MLB@Realtime Communications
Intended status: Informational                                  C. Wendt
Expires: September 14, 2017                                      Comcast
                                                          March 13, 2017

       ACME Identifiers and Challenges for VoIP Service Providers
                 draft-barnes-acme-service-provider-00

Abstract

   This document specifies identifiers and challenges required to enable
   the Automated Certificate Management Environment (ACME) to issue
   certificates for VoIP service providers to support Secure Telephony
   Identity (STI).

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   This Internet-Draft will expire on September 14, 2017.

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Barnes & Wendt         Expires September 14, 2017               [Page 1]
Internet-Draft Service Provider Identifier and Challenges     March 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Service Provider Code Identifier Type . . . . . . . . . . . .   3
   4.  Challenges for Service Providers  . . . . . . . . . . . . . .   3
   5.  Service Provider Identifier Code and Challenges Example . . .   4
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
     6.1.  ACME Service Provider Code Identifier . . . . . . . . . .   5
     6.2.  ACME Service Provider Challenge . . . . . . . . . . . . .   6
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   8.  Informative References  . . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   [I-D.ietf-acme-acme] is a mechanism for automating certificate
   management on the Internet.  It enables administrative entities to
   prove effective control over resources like domain names, and
   automates the process of generating and issuing certificates.

   The STIR problem statement [RFC7340] identifies the need for Internet
   credentials that can attest authority for the originator of VoIP
   calls in order to detect impersonation, which is currently an enabler
   for common attacks associated with illegal robocalling, voicemail
   hacking, and swatting.  These credentials are used to sign PASSporTs
   [I-D.ietf-stir-passport], which can be carried in using protocols
   such as SIP [I-D.ietf-stir-rfc4474bis].  Currently, the only defined
   credentials for this purpose are the certificates specified in
   [I-D.ietf-stir-certificates].

   [I-D.ietf-stir-certificates] describes certificate extensions
   suitable for associating telephone numbers and service provider codes
   with certificates.  [I-D.peterson-acme-telephone] specifies the ACME
   extensions to enable certification authorities to issue certificates
   based on telephone numbers.  This specification defines extensions to
   ACME to enable certification authorities to issue certificates based
   on service provider codes.

2.  Overview

   The document [SHAKEN_Certificate_Mgmt] provides a framework and model
   for using certificates based on service provider codes.  In this
   model, each service provider requires only a few certificates which
   are used in conjunction with a PASSporT that contains additional
   information attesting to a service provider's knowledge of the
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