diff --git a/schema/cryptography-defs.json b/schema/cryptography-defs.json
index 2d1a7f19..66f1fa80 100644
--- a/schema/cryptography-defs.json
+++ b/schema/cryptography-defs.json
@@ -834,6 +834,29 @@
         }
       ]
     },
+    {
+      "family": "ANSI-KDF",
+      "standard": [
+        {
+          "name": "X9.42",
+          "url": "https://webstore.ansi.org/standards/ASCX9/ansix9422003r2013"
+        },
+        {
+          "name": "X9.63",
+          "url": "https://webstore.ansi.org/standards/ASCX9/ansix9632011r2017"
+        }
+      ],
+      "variant": [
+        {
+          "pattern": "ANSI-KDF-X9.42[-{hashAlgorithm}]",
+          "primitive": "kdf"
+        },
+        {
+          "pattern": "ANSI-KDF-X9.63[-{hashAlgorithm}]",
+          "primitive": "kdf"
+        }
+      ]
+    },
     {
       "family": "GOST",
       "variant": [