diff --git a/book/source/glossary.md b/book/source/glossary.md
index 7f75c07..dc23a57 100644
--- a/book/source/glossary.md
+++ b/book/source/glossary.md
@@ -166,6 +166,11 @@ Embedded Signature Subpacket
 
     See [RFC 5.2.3.34](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#name-embedded-signature)
 
+Encrypted Data
+    Data that is encrypted.
+
+    See [](/encryption.html).
+
 Encryption Key Flag
     A {term}`Key Flag`, indicating that a {term}`Component Key` can be used for encrypting data. See [](key-flags).