diff --git a/book/source/06-signatures.md b/book/source/06-signatures.md
index 1f05423..c84eb2b 100644
--- a/book/source/06-signatures.md
+++ b/book/source/06-signatures.md
@@ -9,7 +9,7 @@ SPDX-License-Identifier: CC-BY-SA-4.0
 
 Without {term}`signatures<OpenPGP Signature Packet>`, {term}`keys<Transferable Secret Key>` would remain unassociated with any {term}`certificate<OpenPGP Certificate>` or {term}`owner<Certificate Holder>`. {term}`Signatures<OpenPGP Signature Packet>` are crucial for binding {term}`component keys<Component Key>` and {term}`identity components<Identity Component>` into hierarchical {term}`certificates<OpenPGP Certificate>` and for establishing the {term}`authenticity<Authentication>` of messages.
 
-## Terminology
+## Terminology: "cryptographic signatures" and "signature packets"
 
 Within OpenPGP, the term *{term}`signature<OpenPGP Signature Packet>`* can have two different meanings: