RFC 3658 (rfc3658) - Page 2 of 19

Delegation Signer (DS) Resource Record (RR)

RFC 3658      Delegation Signer (DS) Resource Record (RR)  December 2003


Table of Contents

   1.  Introduction. . . . . . . . . . . . . . . . . . . . . . . . .   3
       1.2.  Reserved Words. . . . . . . . . . . . . . . . . . . . .   4
   2.  Specification of the Delegation key Signer. . . . . . . . . .   4
       2.1.  Delegation Signer Record Model. . . . . . . . . . . . .   4
       2.2.  Protocol Change . . . . . . . . . . . . . . . . . . . .   5
             2.2.1.  RFC 2535 2.3.4 and 3.4: Special Considerations
                     at Delegation Points  . . . . . . . . . . . . .   6
                     2.2.1.1. Special processing for DS queries. . .   6
                     2.2.1.2. Special processing when child and an
                              ancestor share nameserver. . . . . . .   7
                     2.2.1.3. Modification on use of KEY RR in the
                              construction of Responses. . . . . . .   8
             2.2.2.  Signer's Name (replaces RFC 3008 section 2.7). .   9
             2.2.3.  Changes to RFC 3090 . . . . . . . . . . . . . .   9
                     2.2.3.1. RFC 3090: Updates to section 1:
                              Introduction . . . . . . . . . . . . .   9
                     2.2.3.2. RFC 3090 section 2.1: Globally
                              Secured. . . . . . . . . . . . . . . .  10
                     2.2.3.3. RFC 3090 section 3: Experimental
                              Status . . . . . . . . . . . . . . . .  10
             2.2.4.  NULL KEY elimination. . . . . . . . . . . . . .  10
       2.3.  Comments on Protocol Changes. . . . . . . . . . . . . .  10
       2.4.  Wire Format of the DS record. . . . . . . . . . . . . .  11
             2.4.1.  Justifications for Fields . . . . . . . . . . .  12
       2.5.  Presentation Format of the DS Record. . . . . . . . . .  12
       2.6.  Transition Issues for Installed Base. . . . . . . . . .  12
             2.6.1.  Backwards compatibility with RFC 2535 and
                     RFC 1035. . . . . . . . . . . . . . . . . . . .  12
       2.7.  KEY and corresponding DS record example . . . . . . . .  13
   3.  Resolver. . . . . . . . . . . . . . . . . . . . . . . . . . .  14
       3.1.  DS Example" . . . . . . . . . . . . . . . . . . . . . .  14
       3.2.  Resolver Cost Estimates for DS Records" . . . . . . . .  15
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
   6.  Intellectual Property Statement . . . . . . . . . . . . . . .  16
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  17
   8.  References. . . . . . . . . . . . . . . . . . . . . . . . . .  17
       8.1.  Normative References. . . . . . . . . . . . . . . . . .  17
       8.2.  Informational References. . . . . . . . . . . . . . . .  17
   9.  Author's Address. . . . . . . . . . . . . . . . . . . . . . .  18
   10. Full Copyright Statement. . . . . . . . . . . . . . . . . . .  19








Gudmundsson                 Standards Track