diff --git a/book/source/03-cryptography.md b/book/source/03-cryptography.md
index 115d087..3fd7a3b 100644
--- a/book/source/03-cryptography.md
+++ b/book/source/03-cryptography.md
@@ -128,7 +128,7 @@ Digital signatures in OpenPGP are used in two primary contexts:
 (hybrid_cryptosystems)=
 ## Hybrid cryptosystems
 
-[Hybrid cryptosystems](https://en.wikipedia.org/wiki/Hybrid_cryptosystem) combine two cryptosystems and make use of their respective advantages:
+[Hybrid cryptosystems](https://en.wikipedia.org/wiki/Hybrid_cryptosystem) merge the strengths of two distinct cryptosystems, capitalizing on their respective advantages:
 
-- A public-key cryptosystem is used to safely handle shared secrets over insecure channels (in OpenPGP: so-called "session keys")
-- A symmetric-key cryptosystem is used to efficiently encrypt and decrypt long messages (using an OpenPGP "session key" as the shared secret)
+- Public-key cryptosystem: used to securely exchange shared secrets, known as "session keys" in OpenPGP, across insecure channels
+- Symmetric-key cryptosystem: used to efficiently encrypt and decrypt long messages, leveraging an OpenPGP "session key" as the shared secret