DNSSEC Operational Practices, Version 2
draft-ietf-dnsop-rfc4641bis-10

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Document Type Active Internet-Draft (dnsop WG)
Last updated 2012-03-30
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DNSOP                                                         O. Kolkman
Internet-Draft                                                W. Mekking
Obsoletes: 4641 (if approved)                                 NLnet Labs
Intended status: Informational                            March 30, 2012
Expires: October 1, 2012

                DNSSEC Operational Practices, Version 2
                     draft-ietf-dnsop-rfc4641bis-10

Abstract

   This document describes a set of practices for operating the DNS with
   security extensions (DNSSEC).  The target audience is zone
   administrators deploying DNSSEC.

   The document discusses operational aspects of using keys and
   signatures in the DNS.  It discusses issues of key generation, key
   storage, signature generation, key rollover, and related policies.

   This document obsoletes RFC 4641 as it covers more operational ground
   and gives more up-to-date requirements with respect to key sizes and
   the DNSSEC operations.

Status of this Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
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   This Internet-Draft will expire on October 1, 2012.

Copyright Notice

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Internet-Draft   DNSSEC Operational Practices, Version 2      March 2012

   Copyright (c) 2012 IETF Trust and the persons identified as the
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Internet-Draft   DNSSEC Operational Practices, Version 2      March 2012

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  5
     1.1.  The Use of the Term 'key'  . . . . . . . . . . . . . . . .  6
     1.2.  Time Definitions . . . . . . . . . . . . . . . . . . . . .  6
   2.  Keeping the Chain of Trust Intact  . . . . . . . . . . . . . .  7
   3.  Keys Generation and Storage  . . . . . . . . . . . . . . . . .  8
     3.1.  Operational Motivation for Zone Signing Keys and Key
           Signing Keys . . . . . . . . . . . . . . . . . . . . . . .  8
     3.2.  Practical Consequences of KSK and ZSK Separation . . . . . 10
       3.2.1.  Rolling a KSK that is not a trust anchor . . . . . . . 10
       3.2.2.  Rolling a KSK that is a trust anchor . . . . . . . . . 11
       3.2.3.  The use of the SEP flag  . . . . . . . . . . . . . . . 12
     3.3.  Key Effectivity Period . . . . . . . . . . . . . . . . . . 12
     3.4.  Cryptographic Considerations . . . . . . . . . . . . . . . 14
       3.4.1.  Key Algorithm  . . . . . . . . . . . . . . . . . . . . 14
       3.4.2.  Key Sizes  . . . . . . . . . . . . . . . . . . . . . . 14
       3.4.3.  Private Key Storage  . . . . . . . . . . . . . . . . . 15
       3.4.4.  Key Generation . . . . . . . . . . . . . . . . . . . . 16
       3.4.5.  Differentiation for 'High-Level' Zones?  . . . . . . . 17
   4.  Signature Generation, Key Rollover, and Related Policies . . . 18
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