From f5226d34ea97490111987467f3a9cb08775c7d6e Mon Sep 17 00:00:00 2001
From: Tobias Eidelpes <tobias@eidelpes.info>
Date: Tue, 14 Jun 2022 11:25:43 +0200
Subject: [PATCH] Add solution for 1d

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

diff --git a/exam/ex.tex b/exam/ex.tex
index ff9f086..c84a2a5 100644
--- a/exam/ex.tex
+++ b/exam/ex.tex
@@ -63,7 +63,11 @@
       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 Since EWCDM is based on a block cipher and a hash function and because
+      those usually operate on fixed-length inputs, the construction also
+      operates on fixed-length inputs. Messages come in variable-length sizes
+      and need to be padded by the block cipher to the specified block size.
+
     \item \TODO
     \item \TODO
     \item \TODO