Y https://tools.ietf.org/html/rfc7129 → Authenticated Denial of Existence in the DNS
Y https://tools.ietf.org/html/rfc7646 → Definition and Use of DNSSEC Negative Trust Anchors
~ https://tools.ietf.org/html/rfc7719 → DNS Terminology
+Y https://tools.ietf.org/html/rfc8080 → Edwards-Curve Digital Security Algorithm (EdDSA) for DNSSEC
Also relevant: