HTTP Origin-Bound Authentication (HOBA)
RFC 7486

Document Type RFC - Experimental (March 2015; No errata)
Last updated 2015-10-14
Replaces draft-farrell-httpbis-hoba
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Yoav Nir
Shepherd write-up Show (last changed 2014-12-10)
IESG IESG state RFC 7486 (Experimental)
Consensus Boilerplate Yes
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Responsible AD Kathleen Moriarty
Send notices to (None)
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                        S. Farrell
Request for Comments: 7486                        Trinity College Dublin
Category: Experimental                                        P. Hoffman
ISSN: 2070-1721                                           VPN Consortium
                                                               M. Thomas
                                                               Phresheez
                                                              March 2015

                HTTP Origin-Bound Authentication (HOBA)

Abstract

   HTTP Origin-Bound Authentication (HOBA) is a digital-signature-based
   design for an HTTP authentication method.  The design can also be
   used in JavaScript-based authentication embedded in HTML.  HOBA is an
   alternative to HTTP authentication schemes that require passwords and
   therefore avoids all problems related to passwords, such as leakage
   of server-side password databases.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for examination, experimental implementation, and
   evaluation.

   This document defines an Experimental Protocol for the Internet
   community.  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).  Not
   all documents approved by the IESG are a candidate for any level of
   Internet Standard; see 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/rfc7486.

Farrell, et al.               Experimental                      [Page 1]
RFC 7486              HTTP Origin-Bound Auth (HOBA)           March 2015

Copyright Notice

   Copyright (c) 2015 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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Interfacing to Applications (Cookies) . . . . . . . . . .   4
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   5
     1.3.  Step-by-Step Overview of HOBA-http  . . . . . . . . . . .   6
   2.  The HOBA Authentication Scheme  . . . . . . . . . . . . . . .   6
   3.  Introduction to the HOBA-http Mechanism . . . . . . . . . . .   9
   4.  Introduction to the HOBA-js Mechanism . . . . . . . . . . . .  10
   5.  HOBA's Authentication Process . . . . . . . . . . . . . . . .  11
     5.1.  CPK Preparation Phase . . . . . . . . . . . . . . . . . .  11
     5.2.  Signing Phase . . . . . . . . . . . . . . . . . . . . . .  11
     5.3.  Authentication Phase  . . . . . . . . . . . . . . . . . .  11
   6.  Other Parts of the HOBA Process . . . . . . . . . . . . . . .  12
     6.1.  Registration  . . . . . . . . . . . . . . . . . . . . . .  13
       6.1.1.  Hobareg Definition  . . . . . . . . . . . . . . . . .  14
     6.2.  Associating Additional Keys to an Existing Account  . . .  16
       6.2.1.  Moving Private Keys . . . . . . . . . . . . . . . . .  16
       6.2.2.  Human-Memorable One-Time Password (Don't Do This One)  16
       6.2.3.  Out-of-Band URL . . . . . . . . . . . . . . . . . . .  17
     6.3.  Logging Out . . . . . . . . . . . . . . . . . . . . . . .  17
     6.4.  Getting a Fresh Challenge . . . . . . . . . . . . . . . .  17
   7.  Mandatory-to-Implement Algorithms . . . . . . . . . . . . . .  18
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  18
     8.1.  Privacy Considerations  . . . . . . . . . . . . . . . . .  18
     8.2.  localStorage Security for JavaScript  . . . . . . . . . .  19
     8.3.  Multiple Accounts on One User Agent . . . . . . . . . . .  20
     8.4.  Injective Mapping for HOBA-TBS  . . . . . . . . . . . . .  20
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  21
     9.1.  HOBA Authentication Scheme  . . . . . . . . . . . . . . .  21
     9.2.  .well-known URI . . . . . . . . . . . . . . . . . . . . .  21
     9.3.  Algorithm Names . . . . . . . . . . . . . . . . . . . . .  21
     9.4.  Key Identifier Types  . . . . . . . . . . . . . . . . . .  22

Farrell, et al.               Experimental                      [Page 2]
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