openpgp-workshop/index.md

@@ -105,6 +105,19 @@ What are some useful ways we can use OpenPGP:
 
 ---
 
+## What's Happening Behind the Scenes
+
+* GPG generates a symmetric key (AES) and uses that to encrypt the bulk of the data
+
+* RSA/ECC is used only to encrypt the symmetric key
+
+* The encrypted data packet contains metadata about which public keys were encrypted to
+    * This can be hidden using `--hidden-recipient/-R`
+
+* Inspect packets using `gpg --list-packets <file.asc/file.gpg>`
+
+---
+
 ## Verifying Signatures 📝
 
 * Go to: https://www.qubes-os.org/downloads/
@@ -217,8 +230,6 @@ What are some useful ways we can use OpenPGP:
 
 ## Further Studies
 
-* [keyoxide](https://keyoxide.org/): decentralized tool to create and verify decentralized online identities
-
 * [pass](https://www.passwordstore.org/): Unix based `gpg` password manager
 
 * [OpenPGP for application developers](https://openpgp.dev/book/): Deep dive on OpenPGP