diff --git a/content/notes/05-crypography.md b/content/notes/05-cryptography.md
similarity index 99%
rename from content/notes/05-crypography.md
rename to content/notes/05-cryptography.md
index b572cb036..3df0e3ec5 100644
--- a/content/notes/05-crypography.md
+++ b/content/notes/05-cryptography.md
@@ -1,5 +1,5 @@
 ---
-title: "05-crypography"
+title: "05-cryptography"
 aliases: 
 tags: 
 - lecture
diff --git a/content/notes/comp-210.md b/content/notes/comp-210.md
index 337f8ca9f..4aa549832 100644
--- a/content/notes/comp-210.md
+++ b/content/notes/comp-210.md
@@ -23,6 +23,6 @@ No final exam
 - [01-big-picture](notes/01-big-picture.md)
 - [02-concepts-and-roles](notes/02-concepts-and-roles.md)
 - [03-threats-social-engineering-and-failures](notes/03-threats-social-engineering-and-failures.md)
-- [05-crypography](notes/05-crypography.md)
+- [05-cryptography](notes/05-cryptography.md)
 
 # Archive
diff --git a/content/notes/cryptography.md b/content/notes/cryptography.md
new file mode 100644
index 000000000..70f480848
--- /dev/null
+++ b/content/notes/cryptography.md
@@ -0,0 +1,17 @@
+---
+title: "cryptography"
+aliases: 
+tags: 
+- comp210
+---
+
+Crytography arises from the need for confidentiality. Some people say 
+
+>"if you have nothing to fear you have  nothing to hide". 
+
+Edward snowden said
+
+>"arguing that you don't care about privacy because you have nothing to hide is no different than saying you dont care about free speech because you have nothing to say."
+
+
+
diff --git a/content/notes/randomness.md b/content/notes/randomness.md
new file mode 100644
index 000000000..09c67a2fa
--- /dev/null
+++ b/content/notes/randomness.md
@@ -0,0 +1,8 @@
+---
+title: "randomness"
+aliases: 
+tags: 
+- comp210
+---
+
+