diff --git a/312/notes/topics.md b/312/notes/topics.md
index 91c6158..d013365 100644
--- a/312/notes/topics.md
+++ b/312/notes/topics.md
@@ -13,3 +13,11 @@ _Note that we focus(a ton) on the properties of these ciphers both forwards & ba
 * _Rot Ciphers_
 * Rail Fence
 * Row Transposition
+* Block Cipher
+* Feistal Cipher
+
+## Encryptions
+
+* Triple DES
+* DES
+* AES