diff --git a/book/source/08-signing_components.md b/book/source/08-signing_components.md
index 2cd900b..50e3083 100644
--- a/book/source/08-signing_components.md
+++ b/book/source/08-signing_components.md
@@ -120,7 +120,7 @@ This mutual binding is crucial for security. Without it, an individual (e.g., Al
 Linking an OpenPGP signing subkey to the primary key with a binding signature, and an embedded primary key binding signature
 ```
 
-The back signature signifies the mutuality of the subkey's association with the primary key and is embedded within the subkey binding signature, reinforcing the authenticity of the binding.
+The back signature signifies the mutuality of the subkey's association with the primary key and is embedded as subpacket data within the subkey binding signature, reinforcing the authenticity of the binding.
 
 (bind_ident)=
 ### Binding identities to a certificate