NIST-SC-20 Secure Name/Address Resolution Service (Authoritative Source)

a. Provide additional data origin authentication and integrity verification artifacts along with the authoritative name resolution data the system returns in response to external name/address resolution queries; and b. Provide the means to indicate the security status of child zones and (if the child supports secure resolution services) to enable verification of a chain of trust among parent and child domains, when operating as part of a distributed, hierarchical namespace.

Providing authoritative source information enables external clients, including remote Internet clients, to obtain origin authentication and integrity verification assurances for the host/service name to network address resolution information obtained through the service. Systems that provide name and address resolution services include domain name system (DNS) servers. Additional artifacts include DNS Security Extensions (DNSSEC) digital signatures and cryptographic keys. Authoritative data includes DNS resource records. The means for indicating the security status of child zones include the use of delegation signer resource records in the DNS. Systems that use technologies other than the DNS to map between host and service names and network addresses provide other means to assure the authenticity and integrity of response data.

• T1071 Application Layer Protocol • T1071.001 Web Protocols • T1071.002 File Transfer Protocols • T1071.003 Mail Protocols • T1071.004 DNS • T1553.004 Install Root Certificate • T1566 Phishing • T1566.001 Spearphishing Attachment • T1566.002 Spearphishing Link • T1568 Dynamic Resolution • T1568.002 Domain Generation Algorithms • T1598 Phishing for Information • T1598.002 Spearphishing Attachment • T1598.003 Spearphishing Link