From 14ce6554ec61e96a32d3edb0cb574679870ee3a0 Mon Sep 17 00:00:00 2001
From: Tobias Eidelpes <tobias@eidelpes.info>
Date: Tue, 14 Jun 2022 11:12:18 +0200
Subject: [PATCH] Add solution for 1c

---
 exam/ex.tex | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/exam/ex.tex b/exam/ex.tex
index af036f8..ff9f086 100644
--- a/exam/ex.tex
+++ b/exam/ex.tex
@@ -58,7 +58,11 @@
 
     \item The type of symmetric cryptographic scheme introduced is a Message
       Authentication Code (MAC).
-    \item \TODO
+
+    \item The size of the key(s) depends on the block cipher and the keyed hash
+      function. In total there likely need to be two distinct keys for the block
+      cipher calls and one key for the hash function.
+
     \item \TODO
     \item \TODO
     \item \TODO