ECC in OpenPGP
draft-jivsov-openpgp-ecc-12

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Last updated 2012-04-11 (latest revision 2012-04-10)
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Network Working Group                                        A. Jivsov
Internet Draft                                    Symantec Corporation
Intended status: Standards                              April 10, 2012
Expires: October 7, 2012

                               ECC in OpenPGP
                      draft-jivsov-openpgp-ecc-12.txt

Abstract

   This document defines an Elliptic Curve Cryptography extension to
   the OpenPGP public key format and specifies three Elliptic Curves
   that enjoy broad support by other standards, including standards
   published by the US National Institute of Standards and
   Technology.  The document specifies the conventions for
   interoperability between compliant OpenPGP implementations that
   make use of this extension.

Status of this Memo

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

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   This Internet-Draft will expire on October 7, 2012.

Copyright Notice

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   Copyright (c) 2012 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.................................................2
   2. Conventions used in this document............................2
   3. Elliptic Curve Cryptography..................................3
   4. Supported ECC curves.........................................3
   5. Supported public key algorithms..............................3
   6. Conversion primitives........................................4
   7. Key Derivation Function......................................4
   8. EC DH Algorithm (ECDH).......................................5
   9. Encoding of public and private keys..........................8
   10. Message encoding with public keys...........................9
   11. ECC curve OID...............................................9
   12. Compatibility profiles.....................................10
      12.1. OpenPGP ECC profile...................................10
      12.2. Suite-B profile.......................................10
         12.2.1. Security strength at 192 bits....................10
         12.2.2. Security strength at 128 bits....................11
   13. Security Considerations....................................11
   14. IANA Considerations........................................13
   15. References.................................................13
      15.1. Normative references..................................13
      15.2. Informative references................................14

1. Introduction

   The OpenPGP protocol [RFC4880] supports RSA and DSA public key
   formats.  This document defines the extension to incorporate
   support for public keys that are based on Elliptic Curve
   Cryptography (ECC).

2. Conventions used in this document

   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 [RFC2119].

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   Any implementation that adheres to the format and methods specified
   in this document is called a compliant application.  Compliant
   applications is a subset of the the broader set of [RFC4880]
   OpenPGP applications.  Any [RFC2119] keyword within this document
   applies to compliant applications only.

3. Elliptic Curve Cryptography

   This document establishes the minimum set of Elliptic Curve
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