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capport                                                  D. Harkins, Ed.
Internet-Draft                                             HP Enterprise
Intended status: Informational                            W. Kumari, Ed.
Expires: January 19, 2017                                         Google
                                                           July 18, 2016

                                  OWE
                          draft-harkins-owe-00

Abstract

   This memo specifies an extension to IEEE Std 802.11 to provide for
   opportunistic (unauthenticated) encryption to the wireless media.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 19, 2017.

Copyright Notice

   Copyright (c) 2016 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.

Harkins & Kumari        Expires January 19, 2017                [Page 1]
Internet-Draft              Abbreviated Title                  July 2016

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   2
     1.2.  Notation  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  802.11 Network Access . . . . . . . . . . . . . . . . . . . .   3
   4.  Opportunistic Wireless Encryption . . . . . . . . . . . . . .   4
     4.1.  Cryptography  . . . . . . . . . . . . . . . . . . . . . .   4
     4.2.  OWE Discovery . . . . . . . . . . . . . . . . . . . . . .   5
     4.3.  OWE Association . . . . . . . . . . . . . . . . . . . . .   5
     4.4.  OWE Post-Association  . . . . . . . . . . . . . . . . . .   7
     4.5.  OWE PMK Caching . . . . . . . . . . . . . . . . . . . . .   7
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   6.  Implementation Considerations . . . . . . . . . . . . . . . .   8
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   8.  Normative References  . . . . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   This memo describes a mode of opportunistic encryption [RFC7435] for
   802.11 -- OWE -- that provides encryption of the wireless medium but
   no authentication.

1.1.  Requirements Language

   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 RFC 2119 [RFC2119].

1.2.  Notation

   This memo uses the following notation:

   y = F(X)
       an element-to-scalar mapping function.  For an elliptic curve
       group, it takes a point on the curve and returns the
       x-coordinate; for a finite field element it is the identity
       function, just returning the element itself.

   Z = DH(x,Y)
       for an elliptic curve DH(x,Y) is the multiplication of point Y by
       the scalar value x creating a point on the curve Z; for finite
       field cryptography DH(x,Y) is expontiation of element Y to the
       power of x (implied modulo a field defining prime, p) resulting
       in an element Z.

Harkins & Kumari        Expires January 19, 2017                [Page 2]
Internet-Draft              Abbreviated Title                  July 2016

   a = len(b)
       indicates the length in bits of the string b.

2.  Background

   Many businesses-- bars, coffee shops, etc.-- offer free Wi-Fi as an
   inducement to customers to enter and remain in the premises.  Many
   customers will use the availability of free Wi-Fi as a deciding
   factor in which business to patronize.  Since these businesses are
   not Internet service providers, they are not willing and/or not