diff --git a/book/source/03-cryptography.md b/book/source/03-cryptography.md
index 98bfa7b..92fb7cf 100644
--- a/book/source/03-cryptography.md
+++ b/book/source/03-cryptography.md
@@ -129,10 +129,8 @@ Digital signatures in OpenPGP are used in two primary contexts:
 - [Signatures on components](component_signatures_chapter)
 
 (hybrid_cryptosystems)=
-## Hybrid cryptosystems
+## Hybrid cryptosystems in OpenPGP
 
 [Hybrid cryptosystems](https://en.wikipedia.org/wiki/Hybrid_cryptosystem) combine the use of symmetric and asymmetric (public-key) cryptography to capitalize on the strengths of each, namely symmetric cryptography's speed and efficiency and public-key cryptography's mechanism for secure key exchange.
 
-### Usage and terminology in OpenPGP
-
-OpenPGP uses a hybrid cryptosystem for encryption. Shared secrets are generated uniquely for each session, and are called "session keys." For more on this, see the chapters {ref}`encryption_chapter` and {ref}`decryption_chapter`.
+OpenPGP uses a hybrid cryptosystem for encryption.  This approach involves generating unique shared secrets, known as "session keys," for each session. For detailed information on this topic, please refer to the chapters {ref}`encryption_chapter` and {ref}`decryption_chapter`.
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