Distributing OpenPGP Keys with Signed Keylist Subscriptions
draft-mccain-keylist-03
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Network Working Group M. McCain
Internet-Draft FLM
Intended status: Standards Track M. Lee
Expires: August 16, 2019 TI
N. Welch
Google
February 12, 2019
Distributing OpenPGP Keys with Signed Keylist Subscriptions
draft-mccain-keylist-03
Abstract
This document specifies a system by which an OpenPGP client may
subscribe to an organization's keylist to keep its internal keystore
up-to-date. Ensuring that all members of an organization have their
colleagues' most recent PGP public keys is critical to maintaining
operational security. Without the most recent keys and a source of
trust for those keys (as this document specifies), users must
manually update and sign each others keys -- a system that is
untenable in larger organizations. This document proposes a
experimental format for the keylist file as well as requirements for
clients who wish to implement this experimental keylist subscription
functionality.
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 https://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 August 16, 2019.
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
McCain, et al. Expires August 16, 2019 [Page 1]
Internet-Draft OpenPGP Keylist Subscriptions February 2019
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://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 . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Notation . . . . . . . . . . . . . . . . . . 3
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
1.3. Note to Readers . . . . . . . . . . . . . . . . . . . . . 3
2. Functions and Procedures . . . . . . . . . . . . . . . . . . 3
2.1. Subscribing to Keylists . . . . . . . . . . . . . . . . . 4
2.2. Automatic Updates . . . . . . . . . . . . . . . . . . . . 4
2.3. Cryptographic Verification of Keylists . . . . . . . . . 5
3. Data Element Formats . . . . . . . . . . . . . . . . . . . . 5
3.1. Keylist . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2. Signature . . . . . . . . . . . . . . . . . . . . . . . . 7
4. In Practice . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. Security Considerations . . . . . . . . . . . . . . . . . . . 7
5.1. Security Benefits . . . . . . . . . . . . . . . . . . . . 7
5.2. Security Drawbacks . . . . . . . . . . . . . . . . . . . 7
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.1. Normative References . . . . . . . . . . . . . . . . . . 8
7.2. URIs . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8
1. Introduction
This document specifies a system by which clients may subscribe to
cryptographically signed keylists. This system allows for seamless
key rotation across entire organizations and enhances operational
security. To enable cross-client compatibility, this document
provides a experimental format for the keylist, its cryptographic
verification, and the method by which it is retreived by the client.
The user interface by which a client provides this functionality to
the user is out of scope, as is the process by which the client
retrieves public keys. Other non-security-related implementation
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