Naming Things with Hashes
draft-farrell-decade-ni-05

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Document Type Active Internet-Draft (individual)
Last updated 2012-04-30
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Send notices to stephen.farrell@cs.tcd.ie, cdannewitz@upb.de, Borje.Ohlman@ericsson.com, kutscher@neclab.eu, philliph@comodo.com, ari.keranen@ericsson.com, draft-farrell-decade-ni@tools.ietf.org
Internet Engineering Task Force                               S. Farrell
Internet-Draft                                    Trinity College Dublin
Intended status: Standards Track                             D. Kutscher
Expires: November 1, 2012                                            NEC
                                                            C. Dannewitz
                                                 University of Paderborn
                                                               B. Ohlman
                                                              A. Keranen
                                                                Ericsson
                                                         P. Hallam-Baker
                                                       Comodo Group Inc.
                                                          April 30, 2012

                       Naming Things with Hashes
                       draft-farrell-decade-ni-05

Abstract

   This document defines a set of ways to identify a thing using the
   output from a hash function, specifying URI, URL, binary and human
   "speakable" formats for these names.  The various formats are
   designed to support, but not require, a strong link to the referenced
   object such that the referenced object may be authenticated to the
   same degree as the reference to it.

Status of this Memo

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

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on November 1, 2012.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Farrell, et al.         Expires November 1, 2012                [Page 1]
Internet-Draft          Naming Things with Hashes             April 2012

   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.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
   3.  Named Information (ni) URI Format  . . . . . . . . . . . . . .  5
   4.  .well-known URL Format . . . . . . . . . . . . . . . . . . . .  7
   5.  URL Segment Format . . . . . . . . . . . . . . . . . . . . . .  8
   6.  Binary Format  . . . . . . . . . . . . . . . . . . . . . . . .  9
   7.  Human-readable Format  . . . . . . . . . . . . . . . . . . . .  9
   8.  Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
   9.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 12
     9.1.  Assignment of Named Information (ni) URI Scheme  . . . . . 12
     9.2.  Assignment of Named Information for Humans (nih) URI
           Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     9.3.  Assignment of Well Known URI prefix ni . . . . . . . . . . 13
     9.4.  Hash Name Algorithm Registry . . . . . . . . . . . . . . . 14
   10. Security Considerations  . . . . . . . . . . . . . . . . . . . 15
   11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 15
   12. References . . . . . . . . . . . . . . . . . . . . . . . . . . 16
     12.1. Normative References . . . . . . . . . . . . . . . . . . . 16
     12.2. Informative References . . . . . . . . . . . . . . . . . . 17
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 18

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1.  Introduction

   Names or identifiers are used in various protocols for identifying
   resources.  In many scenarios those names or identifiers contain
   values that are hash function outputs.  However, different
   deployments have chosen various different ways to include hash
   function outputs in such names or identifiers.  This document
   specifies standard ways to do that to aid interoperability.

   Hash function outputs can be used to ensure uniqueness in terms of
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