Add image to authenticated encryption silde for encryption module (#884)

* Add image to authenticated encryption silde for encryption module * Add notes to the AE slide to clarifys the AE EtM image
Polkadot-Blockchain-Academy · Jan 2, 2024 · a29bb0e · a29bb0e
1 parent 5145304
commit a29bb0e
Show file tree

Hide file tree

Showing 2 changed files with 6 additions and 0 deletions.
diff --git a/syllabus/1-Cryptography/4-Encryption-slides.md b/syllabus/1-Cryptography/4-Encryption-slides.md
@@ -237,12 +237,18 @@ Authenticated encryption adds a **M**essage **A**uthentication **C**ode to addit
 
 A reader can check the MAC to ensure the message was constructed by someone knowing the secret.
 
+<img style="height: 500px" src="./img/Authenticated_Encryption_EtM.png" />
+
 Notes:
 
 Specifically, this authenticity says that _anyone who does not know the sender's secret_ could not construct the message.
 
 Generally, this adds ~16-32 bytes of overhead per encrypted message.
 
+The image only shows only of of many possible constructions of authenticated encryption.
+
+Explain that the Key2 in the image, could be derived from Key1.
+
 ---
 
 ## AEAD (**A**uthenticated **E**ncryption **A**dditional **D**ata)

diff --git a/syllabus/1-Cryptography/img/Authenticated_Encryption_EtM.png b/syllabus/1-Cryptography/img/Authenticated_Encryption_EtM.png