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