1 files changed, 13 insertions, 1 deletions

diff --git a/draft-schanzen-gns.xml b/draft-schanzen-gns.xml
index 42f1e4e..961ee7d 100644
--- a/draft-schanzen-gns.xml
+++ b/draft-schanzen-gns.xml
@@ -1287,6 +1287,17 @@ ZKDF-Public(zk,label):
          </t>
          <artwork name="" type="" align="left" alt=""><![CDATA[
 SignDerived(d,label,message):
+  /* Calculate public key */
+  a := SHA-512 (d)
+  a[0] &= 248;
+  a[31] &= 127;
+  a[31] |= 64;
+  zk := a * G
+
+  /* Calculate blinding factor */
+  PRK_h := HKDF-Extract ("key-derivation", zk)
+  h := HKDF-Expand (PRK_h, label | "gns", 512 / 8)
+
   d' := ZKDF-Private(d,label)
   dh := SHA-512 (d)
   nonce := SHA-256 (dh[32..63] | h)
@@ -2934,7 +2945,8 @@ Purpose | Name            | References | Comment
      <section>
        <name>Test Vectors</name>
        <t>
-
+         The following are test vectors for the Base32 variation of a
+         Crockford Base32 encoding used for zTLDs.
        </t>
        <artwork name="" type="" align="left" alt="">
          <![CDATA[