pretty Easy privacy (pEp): Privacy by Default
draft-birk-pep-02

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Last updated 2018-06-26
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Network Working Group                                            V. Birk
Internet-Draft                                                H. Marques
Intended status: Standards Track                             S. Shelburn
Expires: December 29, 2018                                pEp Foundation
                                                           June 27, 2018

             pretty Easy privacy (pEp): Privacy by Default
                           draft-birk-pep-02

Abstract

   Building on already available security formats and message transports
   (like PGP/MIME for email), and with the intention to stay
   interoperable to systems widespreadly deployed, pretty Easy privacy
   (pEp) describes protocols to automatize operations (key management,
   key discovery, private key handling including peer-to-peer
   synchronization of private keys and other user data across devices)
   that have been seen to be barriers to deployment of end-to-end secure
   interpersonal messaging. pEp also relies on "Trustwords" (as a word
   mapping of of fingerprints) to verify communication peers and
   proposes a trust rating system to denote secure types of
   communications and signal the privacy level available on a per-user
   and per-message level.  In this document, the general design choices
   and principles of pEp are outlined.

Status of This Memo

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   This Internet-Draft will expire on December 29, 2018.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Birk, et al.            Expires December 29, 2018               [Page 1]
Internet-Draft          pretty Easy privacy (pEp)              June 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Protocol's Core Design Principles . . . . . . . . . . . . . .   4
     3.1.  Privacy by Default  . . . . . . . . . . . . . . . . . . .   4
     3.2.  Interoperability  . . . . . . . . . . . . . . . . . . . .   5
     3.3.  Peer-to-Peer (P2P)  . . . . . . . . . . . . . . . . . . .   5
     3.4.  User Experience (UX)  . . . . . . . . . . . . . . . . . .   6
   4.  pEp identity system . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Terms . . . . . . . . . . . . . . . . . . . . . . . . . .   7
       4.1.1.  Key . . . . . . . . . . . . . . . . . . . . . . . . .   7
       4.1.2.  User  . . . . . . . . . . . . . . . . . . . . . . . .   7
       4.1.3.  Address . . . . . . . . . . . . . . . . . . . . . . .   7
       4.1.4.  Identity  . . . . . . . . . . . . . . . . . . . . . .   7
     4.2.  Example: Difference between pEp and OpenPGP . . . . . . .   8
   5.  Key Management  . . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  Private Keys  . . . . . . . . . . . . . . . . . . . . . .   9
     5.2.  Public Key Distribution . . . . . . . . . . . . . . . . .   9
     5.3.  Passphrases . . . . . . . . . . . . . . . . . . . . . . .  10
   6.  Privacy Status  . . . . . . . . . . . . . . . . . . . . . . .  10
   7.  Options in pEp  . . . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  Option "Passive Mode" . . . . . . . . . . . . . . . . . .  11
     7.2.  Option "Disable Protection" . . . . . . . . . . . . . . .  11
       7.2.1.  For all communications  . . . . . . . . . . . . . . .  11
       7.2.2.  For some communications . . . . . . . . . . . . . . .  11
     7.3.  Option "Extra Keys" . . . . . . . . . . . . . . . . . . .  12
     7.4.  Option "Blacklist Keys" . . . . . . . . . . . . . . . . .  12
     7.5.  Establishing trust between peers  . . . . . . . . . . . .  12
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   9.  Implementation Status . . . . . . . . . . . . . . . . . . . .  13
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