A Reputation Query Protocol
RFC 7072

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Internet Engineering Task Force (IETF)                     N. Borenstein
Request for Comments: 7072                                      Mimecast
Category: Standards Track                                   M. Kucherawy
ISSN: 2070-1721                                            November 2013

                      A Reputation Query Protocol

Abstract

   This document defines a mechanism to conduct queries for reputation
   information over the HyperText Transfer Protocol (HTTP) using
   JavaScript Object Notation (JSON) as the payload meta-format.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7072.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Borenstein & Kucherawy       Standards Track                    [Page 1]
RFC 7072               A Reputation Query Protocol         November 2013

Table of Contents

   1. Introduction ....................................................2
   2. Terminology and Definitions .....................................2
      2.1. Key Words ..................................................2
      2.2. Other Definitions ..........................................3
   3. Description .....................................................3
      3.1. Overview ...................................................3
      3.2. URI Template ...............................................3
      3.3. Syntax .....................................................4
      3.4. Response ...................................................6
      3.5. Protocol Support ...........................................6
   4. IANA Considerations .............................................7
   5. Security Considerations .........................................7
   6. References ......................................................8
      6.1. Normative References .......................................8
      6.2. Informative References .....................................8
   Appendix A. Acknowledgements .......................................9

1.  Introduction

   This document defines a method to query a reputation data service for
   information about an entity, using the HyperText Transfer Protocol
   (HTTP) as the transport mechanism and JSON as the payload meta-
   format.

   The mechanism is a two-stage query:

   1.  A client retrieves a template from a server that describes the
       construction of a Universal Resource Identifier (URI) that will
       be the actual query;

   2.  The client then uses the constructed URI to request the
       reputation data from the server.

2.  Terminology and Definitions

   This section defines terms used in the rest of the document.

2.1.  Key Words

   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 [KEYWORDS].

Borenstein & Kucherawy       Standards Track                    [Page 2]
RFC 7072               A Reputation Query Protocol         November 2013

2.2.  Other Definitions

   Other terms of importance in this document are defined in [RFC7070]
   and [RFC7071].

3.  Description

3.1.  Overview

   The components to the question being asked are the following:

   o  The subject of the query;

   o  The name of the host, or the IP address, at which the reputation
      service is available;

   o  The name of the reputation application, i.e., the context within
      which the subject is being evaluated;

   o  Optionally, names of the specific reputation assertions or
      attributes that are being requested.

   There is no discovery protocol for finding reputation services.
   These are typically subscription services, negotiated between
   operators through some out-of-band method.

   Assertions are discussed in [RFC7071].